diff --git a/platforms/_core_info.json b/platforms/_core_info.json
new file mode 100644
index 00000000..5bfe1431
--- /dev/null
+++ b/platforms/_core_info.json
@@ -0,0 +1,331 @@
+{
+  "repository": "https://github.com/libretro/libretro-core-info",
+  "blobs": {
+    "00_example": "68a87f20d197cfb075dc744b911c354f4ee9c7e3",
+    "2048": "df66c7f6b23da5b6d7df6ec38ecdded2ea785225",
+    "3dengine": "f93e2625d5445c4e0319088f4fbacd693a9bf5a6",
+    "81": "4e0c43e15f0bdc299b2d706a1d496505a8c95ba1",
+    "DoubleCherryGB": "aedcc6d5a2fbd4df97ce391daab8019134b51384",
+    "FreeIntvTSOverlay": "469592af9ebe2239b3665218abde6e39d1a9424d",
+    "a5200": "89680e62646b7a9e1ba04135063cd6e6033d13f9",
+    "advanced_tests": "a13ebba9e3d4b1f70f882d824268152026ff184a",
+    "amiarcadia": "73e48e85824950f30df26673219cd5ca4548496a",
+    "amiberry": "e5d1f0f9a143594d893031caed9aa760ff34ce0a",
+    "anarch": "f06701967498ab0a5dfc0c7ca50c3aeea6c9e6e6",
+    "applewin": "c999c4b73ff48409acecb0239214c74f3464bcd1",
+    "ardens": "938877e6a867441fbab2edfd19acc3d85f4b0277",
+    "arduous": "cb6f0917fa4454126fdb93714eadb6d6cfab1a9f",
+    "armsx2": "c8a763b3d75e84997218323350a22cc79fe8e39a",
+    "atari800": "07b87e91cf4577db7791188399f1cc1f320932f0",
+    "azahar": "1173e2e8a919d578cc589545cb3c0c71dc4e1188",
+    "b2": "140b31e2d829f094fbf81856f63acd8f3c97f9e8",
+    "bbkemu": "ee36e46bfcff3ec6f66da3e35bc249d398d962ca",
+    "beetle_saturn": "d0364ee2ba9f0ba1e676dcf397cc66aad5204f8d",
+    "bennugd": "620191828ed5ac08426aa132a7e15dabfe78b702",
+    "bk": "7025d150c3265eaaabf8c1863a7fe367402f2dc1",
+    "blastem": "0850a1ce3c92ed115ea42d7df89741c26e46907a",
+    "bluemsx": "8ea8ac764e50f2618e4936dcf7d8dc43952488c1",
+    "bnes": "fcd6e352d4949a876014c516d9afc86fd25ae92c",
+    "boom3": "f7c3290aa476e2fa724b97974713bdfb9d9594d9",
+    "boytacean": "88da1bdd694a20ed1e3065cab07fe40205cedd9a",
+    "bsnes": "e414e247241ad1578c7c500b6009d0d9f3793900",
+    "bsnes-jg": "ea6966241dede9af48e3719478e41f0f8e3af565",
+    "bsnes2014_accuracy": "f4eb380fb2d70883b6bac33a7f8d6a8fb5a14ef2",
+    "bsnes2014_balanced": "ac390a8a0c6e6f095f55ce5806f55f02cd599937",
+    "bsnes2014_performance": "c733738d8b87b75def115381b066271df424affd",
+    "bsnes_cplusplus98": "f41a72cbba0287cd2d77d0f6d3344fc388b0f4eb",
+    "bsnes_hd_beta": "587c7282de1309894e49d7e90a6ea646cebf859f",
+    "bsnes_mercury_accuracy": "ac0794b5c57ab507326f9024ee2a1fd8b4d7667c",
+    "bsnes_mercury_balanced": "311b1630f18ab748901c5ee1a5a78b1424ba76e9",
+    "bsnes_mercury_performance": "82478bc1d89f8c09192461ef63119e3c7de33644",
+    "cannonball": "63d5881e7b6f64c4e320d937d90aec90783325f6",
+    "cap32": "6c814e8a1bfe4ec17ab4d36a24e6bbc919accf2e",
+    "cdi2015": "383f3b1388d2181e9af2f147e8c42e156b1ef3ae",
+    "cemu": "ab3e19d6975762f03a17e6602f504915622e7416",
+    "chailove": "79e1ee7b89725e4cba1334101b7cd1cae5d3f4f0",
+    "chimerasnes": "c038f874a3fc5ba64313063a7354f79438edbf61",
+    "citra": "e5d3b56989a82db718ee1d840571be9f1cc50b37",
+    "citra2018": "d306c4e2cb65cf83930ba4b5f131a61077a17a78",
+    "citra_canary": "0b1fd85442193d317370fb5410293366b1595c6c",
+    "clownmdemu": "00482d6fe4127fcd9fc59df68a0c9b5475c06c9e",
+    "craft": "e6fa30b75f892dfce039765b1b842e1f970ab038",
+    "crocods": "e3510a13cf2b285745a467c28ed3bb521f7fe936",
+    "cruzes": "d5bea3f63b4ad964fc5dc98bca37ce083f9732c1",
+    "daphne": "2d9268f2857ffbb826faba53a8dab973a2d8e2ff",
+    "desmume": "b176acacbbbec9d1924cd452fbf749e2515d61d9",
+    "desmume2015": "c3c14e4185b97115f9fe36ba2efa4f62f8742fec",
+    "dice": "2f1a4407867e03bb4f1e3a4590b318037ef6b709",
+    "dingooemu": "cd176c4ababe6feb9f27124a323564e4a13b3950",
+    "dinothawr": "ec1748f05742ce35cbd084b78785214e7d6a7cc8",
+    "directxbox": "a22c5e753b66a08aa98529c8145d1a4ccd328a21",
+    "dirksimple": "9754af3cff83a269fb29d17659bb6770e3b3f536",
+    "dolphin": "8ab1934d2c309f738f69ef603be9bebacd5fa545",
+    "dolphin_launcher": "6af4403328719b1af674e34fcb3aabfee1d6dd29",
+    "dosbox": "b9979165292ec0a4aa9fc0bece5887aeb195112e",
+    "dosbox_core": "5634e336ccefa587960bf6099ecb247abb879db1",
+    "dosbox_pure": "2afbf74996a013507f6fcb76a2ed40ca82eddb80",
+    "dosbox_svn": "e21a8e0ec4912ae4efb203a68231dceaf82b73b5",
+    "dosbox_svn_ce": "8f06959e2c24f023174e9eeeef7b5818a5cf0045",
+    "doukutsu_rs": "6e40973b911b81ce799156cec69af0f716e8b0e8",
+    "duckstation": "7113d3c62a314cc6da7ef3bc12efec29f415ed6b",
+    "easyrpg": "d057e86ecc3482bc41dd88e5af75a59dea3360c6",
+    "ecwolf": "514cca6aa6df9f5552e9119d6173d3ff0d4e1a4a",
+    "eka2l1": "b6a0192caf919ef988bef44653153eb4815b3852",
+    "emucv": "1cf170a6eea802ed5f58d51482b06098f20ee7d6",
+    "emuscv": "37ca60ffca2affc6e2a264184cf16b64a5a9d1d1",
+    "emux_chip8": "76b0e06041b05ebbf723b101c04e0016729919cc",
+    "emux_gb": "ea951760e5ade5fb20dc4ca56f12e36bfd0a65fd",
+    "emux_nes": "043810ea5c9b3dcd4e82df1427c504331d3fc297",
+    "emux_sms": "8492133ac9cfdc6b765c506b9e549d83368b42da",
+    "ep128emu_core": "c6689eeb5b484e2e420073376f7956b01f4f9be0",
+    "eternal": "85267764b219d487ccb1ea77818bd535cde84911",
+    "fake08": "4e47454003da665a00094ed49e824aa902875a04",
+    "fbalpha2012": "593194b6f89ace127a52961a7a9c0cc251478d07",
+    "fbalpha2012_cps1": "1dd842a35fec91794f2ced1abc3fb5444c81c4cb",
+    "fbalpha2012_cps2": "676a6acae6f1c0f93b402b2cd22bfc7ef4132e12",
+    "fbalpha2012_cps3": "acf3699e74516c40ebb353ce7b73a78b2ba0c241",
+    "fbalpha2012_neogeo": "8002b6464d1ec6937ed57ba23191bb0b18272c3c",
+    "fbneo": "b34cff43b57cab0db469b2fa9c919ef43a48272c",
+    "fbneo_cps12": "b21e20af0b0d8d0c37945189a953b3a3791701ac",
+    "fbneo_neogeo": "c1ce3daa0c022a1c63eb3470a95f08c10eb2ae3d",
+    "fceumm": "84881bc01ed03bdcb2d47f89ab88c09296feb0d4",
+    "ffmpeg": "653c039661e9c564bce6b6325e5cc956296cf096",
+    "fixgb": "3335f3fee37e1843fc8060a7d58317a7fb61efef",
+    "fixnes": "1b1e191debbda3b45f51b20a2819a477fc7407cb",
+    "flycast": "47894ac43adc8876a630a69848e755cc34b7ad68",
+    "flycast_gles2": "7699704ac889ac17c6d0953b5518d3f0bfa4a6c5",
+    "fmsx": "2ba0cdc82c92a1625723e818b14fdf450ae532e1",
+    "freechaf": "43b80752c21ca2c26b610e5890a5d8edf08d8c45",
+    "freeintv": "40d3bc28c03ea0c83ebe8c907aa6f61d9547f063",
+    "freej2me": "690600ece3290683db35eef9c753f368e3ad6c2e",
+    "freej2me_plus": "1437a0bc7f9aa6fcb5a1e7b07aafe046eb3d76bd",
+    "frodo": "00b434e120ef8488ed82a30c01c488cc697ba091",
+    "fsuae": "ccbbfc85cedc9b7ab0f30702584d8b8114437f39",
+    "fuse": "2c53a6834974fe1d7c3e3467f57f3c7b9347eb8e",
+    "galaksija": "f27a232f8ae2ac12bae8436ed8fd220b745e8264",
+    "gam4980": "3d757498a3c9fa728c9df1ee18dd88faf73432fa",
+    "gambatte": "fc1e4e3b8f0ae047fab73ab516c5a0276370303d",
+    "gearboy": "670b1b90974ab6487b792fbeeddf5736afa4318f",
+    "gearcoleco": "2126bdabe8d1d8bb7d6dbcf3d1956502777bbc49",
+    "geargrafx": "79fe02a2840a276d1c834e31910ec91b3d9aa8b0",
+    "gearlynx": "624951f9e137ad27af7eabbf02550bc615a78dd2",
+    "gearsystem": "90d34a245aa2b6ac69a23a9af7952043f5d34425",
+    "genesis_plus_gx": "ae18384f5f4ba3e8417d430419d5fb4c1da02349",
+    "genesis_plus_gx_wide": "7a0deff1895e84f7475928814cdcdc9795471405",
+    "geolith": "e130b2796ea18dcce8cb8dcc6e35361d7c4c1682",
+    "gme": "285c70e52192a80a36b8bcb2f50538a8b8df3a5c",
+    "gong": "299c72ad78ab8c2498640c6eead875651e7072df",
+    "gpsp": "df4023b3909c82118427cac75699529f18904068",
+    "gw": "de42ed9ebe4ffe4f55d25e8523880f2c7c517ca0",
+    "handy": "e9f0c36320a31642202201bce0031f8a73c5a49e",
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+    "hatari2014": "54fde5cfffa09ec45d7a27a9b37978b7742677c2",
+    "hatarib": "9b2901327080b1c81406ba053dc1887fece953f3",
+    "hbmame": "54c043535e2635e936a8ac20912ab125394adf89",
+    "higan_sfc": "9bdcf2d0e92f0e9509b0bd91872c84c3562b9040",
+    "holani": "ec099eecd2d31c2c9355ca0f2b057c877d75e58a",
+    "imageviewer": "5eeb8e208aed6bec71427f6d6ac6bc9c93bb3365",
+    "irogb": "fd57733234d7219ff1758464406d5c67201b8c4e",
+    "ishiiruka": "d8c8c6c016451cb7c0d340eb51f150bf6f0983b3",
+    "jaxe": "5bb4cd5077edf0fce90a51116130894612460d2e",
+    "jollycv": "598b90e899a7d7d46f555c77c89c3a888d8eafb9",
+    "jumpnbump": "ed1a11061c6c53045f3b0d8c10128f719d5ea113",
+    "kronos": "e9711a1019be483c0d994ad1f3109e5ab06d0f2d",
+    "lowresnx": "93b3bc6c1d6204449a63b5c3d665c1cf230f0158",
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+    "m2000": "5a93b6679ed203a68db5cd8478a2fdfd03c86bf0",
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+    "mamearcade": "86f27948d45ed51bf9c6d523ebc1d63d5d92e840",
+    "mamemess": "77add36a71f40fd7bfb2cd3ba5664520346805fe",
+    "mcsoftserve": "3afd94c19a09208f3871b1045dc72d552627d11c",
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+    "mupen64plus_next": "e1fb9671b409bb51eda8a149862629a0b9b3dc35",
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+    "mupen64plus_next_gles3": "888e3863516ae1ad7795b3c8615aa635551dd7fc",
+    "native32emu": "c8b84e368952bea94f0710fbf9f6b5559bd6b5ba",
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+    "nicaiemu": "73472736288c7fb9ca98a711faabdfaa4f28153b",
+    "noods": "14e06a6c4a191fbfaf34b1770bff9ed6588c5ada",
+    "np2kai": "c23d1e3b202102da7102e5f693a309079102d64b",
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+    "nuance": "da298e6f6f087ba3121489556970118ea6056522",
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+    "onscripter": "96105396ccb990a5d0ca2d7fcbe832701a58f3f2",
+    "onsyuri": "45f2acc5c2060ad23904a0bc2ccda43918391f3e",
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+    "panda3ds": "f95daaa5e6e68dabe71e825655f09a7e3c7b17fd",
+    "parallel_n64": "320b88d1032d3caa5ae3b39469dacc005ccae59b",
+    "parallel_n64_debug": "96611a7235f47b06075d237ef8e5d33207d195a2",
+    "pascal_pong": "a1810d465843e18701c208c9ec2a92d783195fe3",
+    "pcee2": "d2d27eff25a2135155dce50aa4cd75255887aec1",
+    "pcem": "66a67eb4428d34d796fa1d2f6a6546ed8d4fa26a",
+    "pcsx1": "0726d1eebfb99cdf672c1424d1a8a0690bf6dfe2",
+    "pcsx2": "a00056b019ba696ee75fcd11d4fec0a9085c4b89",
+    "pcsx_rearmed": "33df7832b10c5253967ca18c63149d6c7dfc743b",
+    "pcsx_rearmed_interpreter": "14cc4bb82765c2c5c96074d5b117922178590499",
+    "pcsx_rearmed_neon": "6d374259a34c88735a502d1d2de18e7fc95e990f",
+    "pd777": "d7ab7e6e9c9755a62d4cde072fc4b8460da64594",
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+    "play": "b91e6d04d33a86694d1e14ed8f3cddd962805f33",
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+    "pokketstation": "90f40d6c9c3dc0dd347db21afa07d47c1407f032",
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+    "prboom": "0566bbfddd39bd187fbbacdc82bedc2e2744e471",
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+    "puae2021": "97c86e42fe956830e1a3e4539ed4b2ada04f6908",
+    "puzzlescript": "f53511e49d7e193c99de1293893f2c29c178400c",
+    "px68k": "9421920a2234919334a160ae57548adac0c83065",
+    "qemu": "7928c363b7a7d5a7c865d5daac7d088980be3ab7",
+    "quasi88": "431e0b3da4b4930b7eb16d139202934357867cf8",
+    "quicknes": "8fcfcf350a9122d30c51c096f3fd13457fa3b517",
+    "race": "048634385705b2bf33b299abd2c43a7db45a0abe",
+    "radio": "878d659f05691ceaddeb7bf60054cb8018416ba7",
+    "redbook": "e095305bd14d068068d93db1d056e01dd72e946b",
+    "reminiscence": "535c6a79c5639d80039eb5519cfa37a08b81e88b",
+    "remotejoy": "fc0d8dfd3d4a21e675cdde0de25e2b6db962aebd",
+    "retro8": "87cc2d79300807ba11f259e27f9101133f8079d6",
+    "retrodream": "0544849053aa85007b3a4a4162501fa8ad259d9a",
+    "romcleaner": "6c9181472df165dab7449100f01cf6def1d9d707",
+    "rp6502": "128440e0c79671b0bdd13bad6b04f05ccd12492f",
+    "rustation": "01fdab0903e30a19a0ca299fc15b8aa241843417",
+    "rustynes": "c231a5836ff48970ada68f39cb002ebba190dbb8",
+    "rvvm": "5fe5334df5112ff14bee0009f2de55656fb815a4",
+    "same_cdi": "2bc8421aef357ccb70d320a113045b1bc2f8aff1",
+    "sameboy": "900d258764ec864fdae7b33d26ccb1f261023193",
+    "sameduck": "7625ddea334c4f1747b10e3ab92459ee2a3b05d7",
+    "scummvm": "17d120c360629463b535c6c872ec7d4faf94fd1c",
+    "sdlpal": "66b1f82a9de6ebc8d924ff82d4b37951d6fcc5f9",
+    "simcp": "7bf05971cd0545aa22e9145547d30c2cbda19b08",
+    "skyemu": "1d82dca4afeab74bed4be85445b1538b9bf28a70",
+    "smsplus": "ea86bf40b6ce50c84dd9dc0905972f1c2a6e2222",
+    "snes9x": "aad2e41f7a6f9663bf93e080f9b75068c204dcb3",
+    "snes9x2002": "1535b62e6098a7c8f3890f2687bae215a4268900",
+    "snes9x2005": "93ec3600e80213fcaf26168c8837d264c6a64267",
+    "snes9x2005_plus": "b7436a7e01fa83ddd57c8c5d7fa573b5a45af597",
+    "snes9x2010": "a6eecb552435a0dc6a54883f7bb41263268111fc",
+    "spmp8000emu": "a7f2dd6a74ef2c3c511e7127ebc5c3e95c9a130a",
+    "squirreljme": "7f276aa61baab33b72452f6a693168be5ecf1285",
+    "stella": "5cdf4139790033096241f62d56cb2c53da32715e",
+    "stella2014": "508af340a5913b19b0e645d81bef2870364db91c",
+    "stella2023": "abf54de5705fdb4df7d12f7db7952edb63c24e27",
+    "stonesoup": "b624f68bc05611fac7e646b63dbe335fc83062ec",
+    "superbroswar": "8a4f806684cba1237a398e3a65ce297656aed642",
+    "supermodel": "1aafc1cc70d192108835666be46a7e1eb8974352",
+    "swanstation": "ab8a9d1a14ae6d7ce33a38ab0294b8ac55018745",
+    "syobonaction": "4c632b15e8931e8c3cea5b760e971f67a33cac57",
+    "tamalibretro": "acb163b7c45456fd0e880bd32ce9d75690299000",
+    "tempgba": "3cdeb907e9a14694cf74b4611395d9dd478cb3b5",
+    "test": "f85524c6b3b569b5acc16980e3df5246b6748043",
+    "test_netplay": "2e7efd155452a5d3c45fc947b0d8eddcba4a1b0b",
+    "testaudio_callback": "10be60661a53052d41bef0316b302b6439b8ab90",
+    "testaudio_no_callback": "8e4b54a4570c6c960200235391854b608234596f",
+    "testaudio_playback_wav": "42d6ccc92c644a79f25ac1c09c6fdaaffa382aef",
+    "testgl": "1d10d7a086c26abb669b6cc3d2d3a19334ddda02",
+    "testgl_compute_shaders": "2b90f8841c367ab9c38bb841ea82942d30dd8cf9",
+    "testgl_ff": "59f2bb4c129aca7dc26a28e4fd0ce90b4a892371",
+    "testinput_buttontest": "eb08c91990fa1af920d357aa01a735f1e597757b",
+    "testretroluxury": "029dae162931a067d8340dfa62f8ae5fe48dc1ae",
+    "testsw": "f17e8892effda5f94b44cc3be49063279d4727bf",
+    "testsw_vram": "07258f7b36225cc23bec5c248d6de327fd38a7dc",
+    "testvulkan": "7b6e9a630201cc3303223f8f907e54546e75a93b",
+    "testvulkan_async_compute": "5bab2d38b89555ef0dd2659b6fcc57208f1c2f30",
+    "tgbdual": "db1f5af20a973dd2ad28ac3a4e235ee5073be46b",
+    "theodore": "7829b8f95b223baa5fde439a40105143636183f5",
+    "thepowdertoy": "e54f44c6c8bd8507932fa05714c1691cebbea9e1",
+    "tia": "e9604c40852f8a02b0ea3ed487810d0071ccc6b9",
+    "tic80": "4c07f9a66921648a01e492580e6415a241c4a277",
+    "trident": "d3ca42ffb218faf3e96c231f13abd4f42926ec7d",
+    "tyrquake": "2b492b43b6bdcce3f62b7ccb06f81b68e5802e0d",
+    "uae4arm": "4609b8172db67dbc9b2c5a6e9c10287f4b07e867",
+    "ume2015": "cc668cd200e31492ac09f6b7f3e77e338f8f10aa",
+    "uw8": "c920638e44627f5ea9fb5a66cd05b925d3fa7744",
+    "uxn": "ae7f7069dd14125875d1474c97eba70c916e3b99",
+    "uzem": "e3cec8c8a0ccee9fba3884a80c8a3c909d513355",
+    "vaporspec": "390f79a6b346d6aa32afb5f5e6356b079a05578b",
+    "vba_next": "edbdb88f64a85755f2085f2cb80d232429f4848b",
+    "vbam": "a6a4751eb8e9048595a161ffeb78106334c9b18b",
+    "vecx": "c1126410f4d0d9abbb8b2b879eed9195613b19e3",
+    "vemulator": "4a16b56827e312a454c488129a96a55760956a8c",
+    "vice_x128": "ed36f29cea1b2f078b5a395e8ea3c8385f8c4156",
+    "vice_x64": "5f6626bd3a5f4960d6cc5b3ad7639e62ff3f2065",
+    "vice_x64dtv": "f51980a6b237b549d69bec751c4e3abe248b006f",
+    "vice_x64sc": "09c7aea1cb6740ba7e57993bd0fcf27f99a8eaf3",
+    "vice_xcbm2": "c8eb7f84bf9e377c75831b903990b8af18662391",
+    "vice_xcbm5x0": "8a1e1a78ef2546c58d8545eff2d3f41a2ec5b27c",
+    "vice_xpet": "2251efb6f5b029e0112dd255e2d691046a903363",
+    "vice_xplus4": "4b46c2f951c2f402cf0ff8c56160b7bfb4460d54",
+    "vice_xscpu64": "4dcef239dd83be5a33ede64a2070adf9a211ef72",
+    "vice_xvic": "33f3689b881367a2400cdead1d7b542a311b4dc2",
+    "video_processor": "5bdc74ff749976a560a534af0d06277153a5c206",
+    "vidtest": "4d8fe9a3f3033d06b5ec8ac28327965dcf951f0b",
+    "vircon32": "66d770352a9a1da119e8f766df17b0bfcbf7d757",
+    "virtualjaguar": "fc434223e248d32c38e46fcd84eae40116d1bbb6",
+    "virtualxt": "0f078c4357c3f6196faea56951930491455b47b8",
+    "vitaquake2": "18ae56936e0857d726df6b1805bcaf39f649e1c8",
+    "vitaquake2-rogue": "5740238c8c868c1bd77278565deb4d0380bff1f9",
+    "vitaquake2-xatrix": "9457b624a2ef954d8a956a9dbb1cade98a4f8535",
+    "vitaquake2-zaero": "b6544d6d13255bdc9811277bf301bf5b764e1912",
+    "vitaquake3": "0fa5379c56f04a121e8026a3694fa45e01a50514",
+    "vitavoyager": "0e17542eeeb904e6bbfedb34db8d628b58b4c09b",
+    "wasm4": "448263d66739c91a3d53c992253b49742416871c",
+    "wqxemu": "75b6fd2d3726386ebf3e2839ab1facbe87df3f7a",
+    "x1": "81e99f41eb8a048defc206383fbabdf281e53b6f",
+    "x64sdl": "4171f40c8a70256a2c5cb70db6a2b8fa733d9b3d",
+    "xemu": "e6033c0002a3311d6f0ba2bd6c1f399324d65e96",
+    "xrick": "2bb032e72b1432fa2c428d186db4ce55dfec8e2f",
+    "yabasanshiro": "bc1d40f813591ab89fb3c69af143976b636a6d89",
+    "yabause": "3b4247a760bff675b05f8436ce0b648cf4ea9e21",
+    "yaps2": "809a88a9100d3021461aba03ffdae5d09a7036f9",
+    "ymir": "13f216fa1b836ac742e907d65fb5f5d462307d95"
+  }
+}
diff --git a/recipes/fbneo.json b/recipes/fbneo.json
index 250a553f..47e3492e 100644
--- a/recipes/fbneo.json
+++ b/recipes/fbneo.json
@@ -1,6 +1,6 @@
 {
   "source": "fbneo",
-  "imported_at": "2026-10-04",
+  "imported_at": "2026-10-21",
   "dats": {
     "FinalBurn Neo - Arcade Games": "1.0.0.03",
     "FinalBurn Neo - Astrocade Home Computer Games": "1.0.0.03",
@@ -1326,6 +1326,41 @@
         "FinalBurn Neo - Arcade Games"
       ]
     },
+    {
+      "dat": "FinalBurn Neo - Arcade Games",
+      "name": "invaders.zip",
+      "set": "invaders",
+      "description": "Space Invaders / Space Invaders M",
+      "members": [
+        {
+          "name": "9316b-0854_m739e.e1",
+          "size": 2048,
+          "crc32": "14e538b0",
+          "sha1": ""
+        },
+        {
+          "name": "9316b-0855_m739f.f1",
+          "size": 2048,
+          "crc32": "0ccead96",
+          "sha1": ""
+        },
+        {
+          "name": "9316b-0856_m739g.g1",
+          "size": 2048,
+          "crc32": "6bfaca4a",
+          "sha1": ""
+        },
+        {
+          "name": "9316b-0869_m739h.h1",
+          "size": 2048,
+          "crc32": "734f5ad8",
+          "sha1": ""
+        }
+      ],
+      "dats": [
+        "FinalBurn Neo - Arcade Games"
+      ]
+    },
     {
       "dat": "FinalBurn Neo - Arcade Games",
       "name": "irrmaze.zip",
@@ -3536,6 +3571,65 @@
         "FinalBurn Neo - Arcade Games"
       ]
     },
+    {
+      "dat": "FinalBurn Neo - Arcade Games",
+      "name": "omegrace.zip",
+      "set": "omegrace",
+      "description": "Omega Race (set 1)",
+      "members": [
+        {
+          "name": "dvgprom.bin",
+          "size": 256,
+          "crc32": "d481e958",
+          "sha1": ""
+        },
+        {
+          "name": "omega.e1",
+          "size": 2048,
+          "crc32": "1d0fdf3a",
+          "sha1": ""
+        },
+        {
+          "name": "omega.f1",
+          "size": 2048,
+          "crc32": "d44c0814",
+          "sha1": ""
+        },
+        {
+          "name": "omega.j7",
+          "size": 4096,
+          "crc32": "8e8d4b54",
+          "sha1": ""
+        },
+        {
+          "name": "omega.k7",
+          "size": 4096,
+          "crc32": "6d10f197",
+          "sha1": ""
+        },
+        {
+          "name": "omega.l7",
+          "size": 4096,
+          "crc32": "edcd7a7d",
+          "sha1": ""
+        },
+        {
+          "name": "omega.m7",
+          "size": 4096,
+          "crc32": "0424d46e",
+          "sha1": ""
+        },
+        {
+          "name": "sound.k5",
+          "size": 2048,
+          "crc32": "7d426017",
+          "sha1": ""
+        }
+      ],
+      "dats": [
+        "FinalBurn Neo - Arcade Games"
+      ]
+    },
     {
       "dat": "FinalBurn Neo - Arcade Games",
       "name": "pgm.zip",
@@ -7703,6 +7797,47 @@
         "FinalBurn Neo - ColecoVision Games"
       ]
     },
+    {
+      "dat": "FinalBurn Neo - ColecoVision Games",
+      "name": "omegrace.zip",
+      "set": "omegrace",
+      "description": "Omega Race (USA, Euro)",
+      "members": [
+        {
+          "name": "Omega Race (USA, Euro)(1983)(Coleco).rom",
+          "size": 16384,
+          "crc32": "0a0511c7",
+          "sha1": ""
+        },
+        {
+          "name": "coleco.rom",
+          "size": 8192,
+          "crc32": "3aa93ef3",
+          "sha1": ""
+        },
+        {
+          "name": "colecoa.rom",
+          "size": 8192,
+          "crc32": "39bb16fc",
+          "sha1": ""
+        },
+        {
+          "name": "czz50.rom",
+          "size": 16384,
+          "crc32": "4999abc6",
+          "sha1": ""
+        },
+        {
+          "name": "svi603.rom",
+          "size": 8192,
+          "crc32": "19e91b82",
+          "sha1": ""
+        }
+      ],
+      "dats": [
+        "FinalBurn Neo - ColecoVision Games"
+      ]
+    },
     {
       "dat": "FinalBurn Neo - ColecoVision Games",
       "name": "pv2000.zip",
@@ -8116,6 +8251,41 @@
         "FinalBurn Neo - MSX 1 Games"
       ]
     },
+    {
+      "dat": "FinalBurn Neo - MSX 1 Games",
+      "name": "skydiver.zip",
+      "set": "skydiver",
+      "description": "Sky Diver (Japan)",
+      "members": [
+        {
+          "name": "Sky Diver (Japan, EN)(1984)(Hudson Soft)[BLOAD'CAS-',R].cas",
+          "size": 11734,
+          "crc32": "93a40a2c",
+          "sha1": ""
+        },
+        {
+          "name": "kanji.rom",
+          "size": 262144,
+          "crc32": "1f6406fb",
+          "sha1": ""
+        },
+        {
+          "name": "msx.rom",
+          "size": 32768,
+          "crc32": "a317e6b4",
+          "sha1": ""
+        },
+        {
+          "name": "msxj.rom",
+          "size": 32768,
+          "crc32": "071135e0",
+          "sha1": ""
+        }
+      ],
+      "dats": [
+        "FinalBurn Neo - MSX 1 Games"
+      ]
+    },
     {
       "dat": "FinalBurn Neo - Megadrive Games",
       "name": "bubsys.zip",
@@ -8150,6 +8320,40 @@
         "FinalBurn Neo - Megadrive Games"
       ]
     },
+    {
+      "dat": "FinalBurn Neo - Megadrive Games",
+      "name": "ggenie1.zip",
+      "set": "ggenie1",
+      "description": "Game Genie (Euro, USA)",
+      "members": [
+        {
+          "name": "sgr001+sgr002.bin",
+          "size": 32768,
+          "crc32": "5f293e4c",
+          "sha1": ""
+        }
+      ],
+      "dats": [
+        "FinalBurn Neo - Megadrive Games"
+      ]
+    },
+    {
+      "dat": "FinalBurn Neo - Megadrive Games",
+      "name": "warrior.zip",
+      "set": "warrior",
+      "description": "Warrior of Rome (USA)",
+      "members": [
+        {
+          "name": "warrior of rome (usa).bin",
+          "size": 1048576,
+          "crc32": "5be10c6a",
+          "sha1": ""
+        }
+      ],
+      "dats": [
+        "FinalBurn Neo - Megadrive Games"
+      ]
+    },
     {
       "dat": "FinalBurn Neo - NES Games",
       "name": "galaga.zip",
@@ -8555,6 +8759,29 @@
         "FinalBurn Neo - ZX Spectrum Games"
       ]
     },
+    {
+      "dat": "FinalBurn Neo - ZX Spectrum Games",
+      "name": "invaders.zip",
+      "set": "invaders",
+      "description": "Invaders (16K)",
+      "members": [
+        {
+          "name": "Invaders 16K (1983)(DK'Tronics).tap",
+          "size": 6795,
+          "crc32": "a6263eb9",
+          "sha1": ""
+        },
+        {
+          "name": "spectrum.rom",
+          "size": 16384,
+          "crc32": "ddee531f",
+          "sha1": ""
+        }
+      ],
+      "dats": [
+        "FinalBurn Neo - ZX Spectrum Games"
+      ]
+    },
     {
       "dat": "FinalBurn Neo - ZX Spectrum Games",
       "name": "mach3.zip",
diff --git a/recipes/mame.json b/recipes/mame.json
index 7eba5ed8..84b93bef 100644
--- a/recipes/mame.json
+++ b/recipes/mame.json
@@ -1,6 +1,6 @@
 {
   "source": "mame",
-  "imported_at": "2026-08-10",
+  "imported_at": "2026-10-21",
   "dats": {
     "MAME mame0190": "mame0190lx",
     "MAME mame0195": "mame0195lx",
@@ -84006,6 +84006,15618 @@
         "MAME mame0289"
       ]
     },
+    {
+      "dat": "MAME mame0289",
+      "name": "32x.zip",
+      "set": "32x",
+      "description": "32x",
+      "members": [
+        {
+          "name": "32x_g_bios.bin",
+          "size": 256,
+          "crc32": "5c12eae8",
+          "sha1": "dbebd76a448447cb6e524ac3cb0fd19fc065d944"
+        },
+        {
+          "name": "32x_m_bios.bin",
+          "size": 2048,
+          "crc32": "dd9c46b8",
+          "sha1": "1e5b0b2441a4979b6966d942b20cc76c413b8c5e"
+        },
+        {
+          "name": "32x_m_bios_sdk.bin",
+          "size": 2048,
+          "crc32": "c7102c53",
+          "sha1": "ed73a47f186b373b8eff765f84ef26c3d9ef6cb0"
+        },
+        {
+          "name": "32x_s_bios.bin",
+          "size": 1024,
+          "crc32": "bfda1fe5",
+          "sha1": "4103668c1bbd66c5e24558e73d4f3f92061a109a"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "32xe.zip",
+      "set": "32xe",
+      "description": "parent 32x",
+      "members": [
+        {
+          "name": "32x_g_bios.bin",
+          "size": 256,
+          "crc32": "5c12eae8",
+          "sha1": "dbebd76a448447cb6e524ac3cb0fd19fc065d944"
+        },
+        {
+          "name": "32x_m_bios.bin",
+          "size": 2048,
+          "crc32": "dd9c46b8",
+          "sha1": "1e5b0b2441a4979b6966d942b20cc76c413b8c5e"
+        },
+        {
+          "name": "32x_m_bios_sdk.bin",
+          "size": 2048,
+          "crc32": "c7102c53",
+          "sha1": "ed73a47f186b373b8eff765f84ef26c3d9ef6cb0"
+        },
+        {
+          "name": "32x_s_bios.bin",
+          "size": 1024,
+          "crc32": "bfda1fe5",
+          "sha1": "4103668c1bbd66c5e24558e73d4f3f92061a109a"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "32xj.zip",
+      "set": "32xj",
+      "description": "parent 32x",
+      "members": [
+        {
+          "name": "32x_g_bios.bin",
+          "size": 256,
+          "crc32": "5c12eae8",
+          "sha1": "dbebd76a448447cb6e524ac3cb0fd19fc065d944"
+        },
+        {
+          "name": "32x_m_bios.bin",
+          "size": 2048,
+          "crc32": "dd9c46b8",
+          "sha1": "1e5b0b2441a4979b6966d942b20cc76c413b8c5e"
+        },
+        {
+          "name": "32x_m_bios_sdk.bin",
+          "size": 2048,
+          "crc32": "c7102c53",
+          "sha1": "ed73a47f186b373b8eff765f84ef26c3d9ef6cb0"
+        },
+        {
+          "name": "32x_s_bios.bin",
+          "size": 1024,
+          "crc32": "bfda1fe5",
+          "sha1": "4103668c1bbd66c5e24558e73d4f3f92061a109a"
+        }
+      ],
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+        "MAME mame0289"
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     {
       "dat": "MAME mame0289",
       "name": "pc6001mk2sr.zip",
@@ -84059,6 +99671,23 @@
         "MAME mame0289"
       ]
     },
+    {
+      "dat": "MAME mame0289",
+      "name": "pc6022.zip",
+      "set": "pc6022",
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     {
       "dat": "MAME mame0289",
       "name": "pc6601.zip",
@@ -84212,6 +99841,8381 @@
       "dats": [
         "MAME mame0289"
       ]
+    },
+    {
+      "dat": "MAME mame0289",
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+          "crc32": "e710628a",
+          "sha1": "103bbe459dc8da27a9400aa45b385255c18fcc75"
+        },
+        {
+          "name": "kanji3.rom",
+          "size": 32768,
+          "crc32": "8cae13ae",
+          "sha1": "273f3329c70b332f6a49a3a95e906bbfe3e9f0a1"
+        },
+        {
+          "name": "kanji4.rom",
+          "size": 32768,
+          "crc32": "3e39de89",
+          "sha1": "d3fd24892bb1948c4697dedf5ff065ff3eaf7562"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "x820iikb.zip",
+      "set": "x820iikb",
+      "description": "x820iikb",
+      "members": [
+        {
+          "name": "820iikey.bin",
+          "size": 1024,
+          "crc32": "8ea3b39b",
+          "sha1": "3f05959f54a558b273567b1b4f0c7cdf46d8d9bf"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "xds19p.zip",
+      "set": "xds19p",
+      "description": "xds19p",
+      "members": [
+        {
+          "name": "1837.e06d",
+          "size": 256,
+          "crc32": "b5d9f883",
+          "sha1": "28303155c515ac2638a06123fbf7e55f89dd2af9"
+        },
+        {
+          "name": "boot_30.e15",
+          "size": 131072,
+          "crc32": "a577087f",
+          "sha1": "2fe9d4d49fd6e8ecd230f8097f7004238afbb626"
+        },
+        {
+          "name": "boot_30.e6",
+          "size": 131072,
+          "crc32": "32449da2",
+          "sha1": "e1bc41987fb9c7da5b7fed5d6714c3451be4438c"
+        },
+        {
+          "name": "x15-3.1l",
+          "size": 1045320,
+          "crc32": "5de8fdf1",
+          "sha1": "4203ffbba775a8c4a1b827621d116ba00839f91a"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "xerox820_16_8.zip",
+      "set": "xerox820_16_8",
+      "description": "xerox820_16_8",
+      "members": [
+        {
+          "name": "8086.u33",
+          "size": 4096,
+          "crc32": "ee49e3dc",
+          "sha1": "a5f20c74fc53f9d695d8894534ab69a39e2c38d8"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "xerox820_emii_flpy5.zip",
+      "set": "xerox820_emii_flpy5",
+      "description": "xerox820_emii_flpy5",
+      "members": [
+        {
+          "name": "537p3682.bin",
+          "size": 4096,
+          "crc32": "88f30a00",
+          "sha1": "54d205e5a7ed80feb7cd06eddc863110fc655dde"
+        },
+        {
+          "name": "8086.u33",
+          "size": 4096,
+          "crc32": "ee49e3dc",
+          "sha1": "a5f20c74fc53f9d695d8894534ab69a39e2c38d8"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "xerox820_emii_rgd5.zip",
+      "set": "xerox820_emii_rgd5",
+      "description": "xerox820_emii_rgd5",
+      "members": [
+        {
+          "name": "537p3682.bin",
+          "size": 4096,
+          "crc32": "88f30a00",
+          "sha1": "54d205e5a7ed80feb7cd06eddc863110fc655dde"
+        },
+        {
+          "name": "8086.u33",
+          "size": 4096,
+          "crc32": "ee49e3dc",
+          "sha1": "a5f20c74fc53f9d695d8894534ab69a39e2c38d8"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "xetec_c5181.zip",
+      "set": "xetec_c5181",
+      "description": "xetec_c5181",
+      "members": [
+        {
+          "name": "xetec c-5181 v1.0.bin",
+          "size": 8192,
+          "crc32": "7ede21e7",
+          "sha1": "431c57e876c7432c07469c461e7438678ebb0043"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
+    },
+    {
+      "dat": "MAME mame0289",
+      "name": "yis604.zip",
+      "set": "yis604",
+      "description": "yis604",
+      "members": [
+        {
+          "name": "yis604bios.rom",
+          "size": 32768,
+          "crc32": "9b3e7b97",
+          "sha1": "0081ea0d25bc5cd8d70b60ad8cfdc7307812c0fd"
+        },
+        {
+          "name": "yis604ext.rom",
+          "size": 16384,
+          "crc32": "4a48779c",
+          "sha1": "b8e30d604d319d511cbfbc61e5d8c38fbb9c5a33"
+        }
+      ],
+      "dats": [
+        "MAME mame0289"
+      ]
     }
   ]
 }
diff --git a/scripts/check_freshness.py b/scripts/check_freshness.py
index c19730cb..ca555380 100644
--- a/scripts/check_freshness.py
+++ b/scripts/check_freshness.py
@@ -40,6 +40,7 @@ import shutil
 import subprocess
 import sys
 import tempfile
+from collections.abc import Iterator
 from concurrent.futures import ThreadPoolExecutor
 from dataclasses import asdict, dataclass, field
 from datetime import datetime, timezone
@@ -56,6 +57,7 @@ from common import (  # noqa: E402
     list_registered_platforms,
     load_emulator_profiles,
     upstream_profile_index,
+    write_text_atomic,
     yaml_load,
 )
 from exporter import discover_exporters  # noqa: E402
@@ -65,6 +67,8 @@ from scripts.scraper.targets import discover_target_scrapers  # noqa: E402
 
 REPO_ROOT = Path(__file__).resolve().parents[1]
 CORE_INFO_REPO = "https://github.com/libretro/libretro-core-info"
+# The git blob of every .info as last reviewed: `--record-coreinfo` writes it.
+CORE_INFO_RECORD = REPO_ROOT / "platforms" / "_core_info.json"
 NO_INTRO_MIRROR = "https://github.com/hugo19941994/auto-datfile-generator"
 NO_INTRO_RELEASE = "Daily_Rebuild"
 NO_INTRO_ASSET = "no-intro.zip"
@@ -107,6 +111,9 @@ class PlatformDiff:
     files_changed: list[str] = field(default_factory=list)
     cores_added: list[str] = field(default_factory=list)
     cores_removed: list[str] = field(default_factory=list)
+    # Any other field the scrape writes: launchers, dual_mode_cores, a
+    # system's core, native_id or data_directories.
+    fields_changed: list[str] = field(default_factory=list)
 
     @property
     def content_changed(self) -> bool:
@@ -119,6 +126,7 @@ class PlatformDiff:
                 self.files_changed,
                 self.cores_added,
                 self.cores_removed,
+                self.fields_changed,
             )
         )
 
@@ -138,6 +146,7 @@ class PlatformDiff:
             ("~files", self.files_changed),
             ("+cores", self.cores_added),
             ("-cores", self.cores_removed),
+            ("~fields", self.fields_changed),
         ):
             if items:
                 shown = ", ".join(items[:SHOWN_ITEMS]) + (", ..." if len(items) > SHOWN_ITEMS else "")
@@ -177,6 +186,33 @@ def _keyed_files(files: list[dict]) -> dict[str, dict]:
     return keyed
 
 
+# Compared on their own above. `source` is the revision read: it moves with
+# every upstream commit, and what that commit changes is diffed field by field.
+_DIFFED_APART = frozenset({"version", "systems", "cores", "standalone_cores", "source"})
+
+
+def _without_refs(value: object) -> object:
+    """*value* without its `source_ref` lines.
+
+    A launcher cites lines of the revision read, so they shift with any
+    upstream commit above them (es_features.cfg:11638 read as :11649 one
+    RetroBat commit later). The cited content is what is compared.
+    """
+    if isinstance(value, dict):
+        return {k: _without_refs(v) for k, v in value.items() if k != "source_ref"}
+    if isinstance(value, list):
+        return [_without_refs(v) for v in value]
+    return value
+
+
+def _changed_fields(old: dict, new: dict, skip: frozenset[str], prefix: str = "") -> list[str]:
+    return [
+        f"{prefix}{key}"
+        for key in sorted(set(old) | set(new), key=str)
+        if key not in skip and _without_refs(old.get(key)) != _without_refs(new.get(key))
+    ]
+
+
 def diff_platform(old: dict, new: dict) -> PlatformDiff:
     """Compare two platform files the way a reviewer reads the diff.
 
@@ -205,6 +241,11 @@ def diff_platform(old: dict, new: dict) -> PlatformDiff:
             for k in sorted(set(old_files) & set(new_files))
             if old_files[k] != new_files[k]
         )
+        diff.fields_changed.extend(_changed_fields(
+            old_systems[system] or {}, new_systems[system] or {},
+            frozenset({"files"}), f"{system}/",
+        ))
+    diff.fields_changed = _changed_fields(old, new, _DIFFED_APART) + diff.fields_changed
     old_cores, new_cores = _core_names(old), _core_names(new)
     diff.cores_added = sorted(new_cores - old_cores)
     diff.cores_removed = sorted(old_cores - new_cores)
@@ -432,6 +473,27 @@ def _transcribed_at(platforms_dir: Path, platform: str) -> float:
     return newest
 
 
+# How the truth model settles two cores' hashes: generate_truth reports it,
+# and it says nothing about whether a cached original is current.
+_MODEL_NOTES = ("WARNING: hash conflict",)
+
+
+@contextlib.contextmanager
+def _without_model_notes() -> Iterator[None]:
+    """Keep the model build's own notes out of the freshness report.
+
+    Anything else written to stderr passes through.
+    """
+    sink = io.StringIO()
+    try:
+        with contextlib.redirect_stderr(sink):
+            yield
+    finally:
+        for line in sink.getvalue().splitlines(keepends=True):
+            if not line.startswith(_MODEL_NOTES):
+                sys.stderr.write(line)
+
+
 def check_native(
     platforms_dir: Path, cache_dir: Path, truth_dir: Path,
     published: Path = Path("exports"),
@@ -444,24 +506,25 @@ def check_native(
         exporter_class = exporters.get(name)
         if not exporter_class:
             continue
-        try:
-            truth, scraped = export_native.load_inputs(name, truth_dir, str(platforms_dir))
-        except export_native.StaleTruth as exc:
-            findings.append(Finding("native", name, STALE, detail=str(exc)))
-            continue
-        systems, _ = build_native_model(truth or {}, scraped)
-        wanted = export_native.wanted_sources(exporter_class(), systems, scraped)
-        reason = native_cache_state(
-            wanted, cache_dir / name, recorded, index, _transcribed_at(platforms_dir, name)
-        )
-        if reason:
-            reason += ", export_native.py --refresh-cache fetches it"
-        else:
-            reason = published_export_state(
-                name, exporter_class, truth_dir, platforms_dir, cache_dir, published
+        with _without_model_notes():
+            try:
+                truth, scraped = export_native.load_inputs(name, truth_dir, str(platforms_dir))
+            except export_native.StaleTruth as exc:
+                findings.append(Finding("native", name, STALE, detail=str(exc)))
+                continue
+            systems, _ = build_native_model(truth or {}, scraped)
+            wanted = export_native.wanted_sources(exporter_class(), systems, scraped)
+            reason = native_cache_state(
+                wanted, cache_dir / name, recorded, index, _transcribed_at(platforms_dir, name)
             )
             if reason:
-                reason += f", export_native.py --platform {name} writes it again"
+                reason += ", export_native.py --refresh-cache fetches it"
+            else:
+                reason = published_export_state(
+                    name, exporter_class, truth_dir, platforms_dir, cache_dir, published
+                )
+                if reason:
+                    reason += f", export_native.py --platform {name} writes it again"
         findings.append(
             Finding(
                 "native",
@@ -660,8 +723,9 @@ def _age_days(stamp: str, now: datetime) -> int | None:
 # --- core-info --------------------------------------------------------------
 
 
-def core_info_names(cache_dir: str, offline: bool) -> list[str] | None:
-    """Every core the libretro core-info repository describes."""
+def core_info_blobs(cache_dir: str, offline: bool) -> dict[str, str] | None:
+    """Every core the libretro core-info repository describes, with the git
+    blob of its .info."""
     repo = upstream.parse_repo(CORE_INFO_REPO)
     if repo is None:
         return None
@@ -673,12 +737,54 @@ def core_info_names(cache_dir: str, offline: bool) -> list[str] | None:
     )
     if not isinstance(payload, list):
         return None
-    names = []
+    blobs = {}
     for entry in payload:
         name = entry.get("name", "") if isinstance(entry, dict) else ""
         if name.endswith("_libretro.info"):
-            names.append(name[: -len("_libretro.info")])
-    return sorted(names)
+            blobs[name[: -len("_libretro.info")]] = str(entry.get("sha") or "")
+    return dict(sorted(blobs.items()))
+
+
+def core_info_names(cache_dir: str, offline: bool) -> list[str] | None:
+    """Every core the libretro core-info repository describes."""
+    blobs = core_info_blobs(cache_dir, offline)
+    return None if blobs is None else list(blobs)
+
+
+def load_core_info_record(path: Path = CORE_INFO_RECORD) -> dict[str, str] | None:
+    if not path.is_file():
+        return None
+    return dict((json.loads(path.read_text(encoding="utf-8")) or {}).get("blobs") or {})
+
+
+def record_core_info(
+    blobs: dict[str, str], names: list[str], path: Path = CORE_INFO_RECORD
+) -> list[str]:
+    """Record the current blob of *names* (every .info when empty) as reviewed.
+
+    Naming the cores keeps a change nobody read out of the record.
+    """
+    unknown = sorted(set(names) - set(blobs))
+    if unknown:
+        raise ValueError(f"no such .info in core-info: {', '.join(unknown)}")
+    recorded = load_core_info_record(path) or {}
+    recorded.update({n: blobs[n] for n in (names or blobs)})
+    payload = {"repository": CORE_INFO_REPO, "blobs": dict(sorted(recorded.items()))}
+    write_text_atomic(str(path), json.dumps(payload, indent=2) + "\n")
+    return sorted(names or blobs)
+
+
+def coreinfo_drift(
+    blobs: dict[str, str], recorded: dict[str, str], profiles: dict[str, dict]
+) -> list[str]:
+    """Profiled cores whose .info is not the one recorded as reviewed.
+
+    The .info is no authority, but a new firmwareN_path in it is the
+    cheapest sign that a profile needs reading again.
+    """
+    index = {key.casefold() for key in profile_name_index(profiles)}
+    return [n for n, sha in blobs.items()
+            if n.casefold() in index and recorded.get(n) != sha]
 
 
 def coreinfo_gaps(
@@ -708,10 +814,14 @@ def coreinfo_gaps(
     return unprofiled, standalone
 
 
-def check_coreinfo(profiles: dict[str, dict], cache_dir: str, offline: bool) -> list[Finding]:
-    names = core_info_names(cache_dir, offline)
-    if names is None:
+def check_coreinfo(
+    profiles: dict[str, dict], cache_dir: str, offline: bool,
+    record_path: Path = CORE_INFO_RECORD,
+) -> list[Finding]:
+    blobs = core_info_blobs(cache_dir, offline)
+    if blobs is None:
         return [Finding("coreinfo", "libretro-core-info", UNKNOWN, detail="listing unavailable")]
+    names = list(blobs)
     unprofiled, standalone = coreinfo_gaps(names, profiles)
     findings = [
         Finding(
@@ -736,6 +846,22 @@ def check_coreinfo(profiles: dict[str, dict], cache_dir: str, offline: bool) ->
         )
         for name, key in standalone
     )
+    recorded = load_core_info_record(record_path)
+    if recorded is None:
+        findings.append(Finding(
+            "coreinfo", "reviewed .info", UNKNOWN,
+            detail=f"no {record_path.name}: run check_freshness.py --record-coreinfo",
+        ))
+        return findings
+    findings.extend(
+        Finding(
+            "coreinfo", name, STALE,
+            local=(recorded.get(name) or "not recorded")[:12], remote=blobs[name][:12],
+            detail=(".info changed since reviewed: read its firmware, then "
+                    f"check_freshness.py --record-coreinfo {name}"),
+        )
+        for name in coreinfo_drift(blobs, recorded, profiles)
+    )
     return findings
 
 
@@ -1278,8 +1404,21 @@ def main() -> int:
         "--emulators-dir", default="emulators",
         help="emulator profile directory (default: %(default)s)",
     )
+    parser.add_argument(
+        "--record-coreinfo", nargs="*", metavar="CORE",
+        help="record the current .info of CORE (every core when none is named) "
+             f"as reviewed in {CORE_INFO_RECORD.relative_to(REPO_ROOT)}, then exit",
+    )
     args = parser.parse_args()
 
+    if args.record_coreinfo is not None:
+        blobs = core_info_blobs(args.cache_dir, args.offline)
+        if not blobs:
+            raise RuntimeError("core-info listing unavailable: nothing recorded")
+        done = record_core_info(blobs, args.record_coreinfo)
+        print(f"recorded {len(done)} .info file(s) as reviewed")
+        return 0
+
     areas = tuple(a.strip() for a in args.only.split(",")) if args.only else AREAS
     unknown = sorted(set(areas) - set(AREAS))
     if unknown:
diff --git a/scripts/generate_pack.py b/scripts/generate_pack.py
index 69236ec0..5bb88852 100644
--- a/scripts/generate_pack.py
+++ b/scripts/generate_pack.py
@@ -3225,46 +3225,48 @@ def _main(held: contextlib.ExitStack) -> None:
         return
 
     data_registry = load_data_dir_registry(args.platforms_dir)
-    if data_registry and not args.offline and not args.no_refresh_data:
-        from refresh_data_dirs import load_registry, refresh_all
+    # The output directory is claimed before the data directory refresh: a
+    # refresh waits for every run that holds a cache, so a second build
+    # during a pipeline sat silent for hours instead of being refused.
+    with _pack_output_lock(args.output_dir):
+        if data_registry and not args.offline and not args.no_refresh_data:
+            from refresh_data_dirs import load_registry, refresh_all
 
-        registry = load_registry(os.path.join(args.platforms_dir, "_data_dirs.yml"))
-        results = refresh_all(registry, force=args.refresh_data)
-        updated = sum(1 for v in results.values() if v)
-        if updated:
-            print(f"Refreshed {updated} data director{'ies' if updated > 1 else 'y'}")
-        failed = sorted(k for k, v in results.items() if v is None)
-        if failed:
-            print(f"WARNING: data directory refresh failed: {', '.join(failed)}")
-    if data_registry:
-        hold_data_dirs(held, data_registry)
+            registry = load_registry(os.path.join(args.platforms_dir, "_data_dirs.yml"))
+            results = refresh_all(registry, force=args.refresh_data)
+            updated = sum(1 for v in results.values() if v)
+            if updated:
+                print(f"Refreshed {updated} data director{'ies' if updated > 1 else 'y'}")
+            failed = sorted(k for k, v in results.items() if v is None)
+            if failed:
+                print(f"WARNING: data directory refresh failed: {', '.join(failed)}")
+        if data_registry:
+            hold_data_dirs(held, data_registry)
 
-    emu_profiles = load_emulator_profiles(args.emulators_dir)
+        emu_profiles = load_emulator_profiles(args.emulators_dir)
 
-    target_cores_cache: dict[str, set[str] | None] = {}
-    if args.target:
-        try:
-            target_cores_cache, platforms = build_target_cores_cache(
-                platforms,
-                args.target,
-                args.platforms_dir,
-                is_all=args.all,
-            )
-        except (FileNotFoundError, ValueError) as e:
-            print(f"ERROR: {e}", file=sys.stderr)
-            sys.exit(1)
+        target_cores_cache: dict[str, set[str] | None] = {}
+        if args.target:
+            try:
+                target_cores_cache, platforms = build_target_cores_cache(
+                    platforms,
+                    args.target,
+                    args.platforms_dir,
+                    is_all=args.all,
+                )
+            except (FileNotFoundError, ValueError) as e:
+                print(f"ERROR: {e}", file=sys.stderr)
+                sys.exit(1)
 
-    groups = group_identical_platforms(
-        platforms, args.platforms_dir, target_cores_cache if args.target else None
-    )
+        groups = group_identical_platforms(
+            platforms, args.platforms_dir, target_cores_cache if args.target else None
+        )
 
-    if args.manifest:
-        with _pack_output_lock(args.output_dir):
+        if args.manifest:
             _run_manifest_mode(
                 args, groups, db, zip_contents, emu_profiles, target_cores_cache
             )
-    else:
-        with _pack_output_lock(args.output_dir):
+        else:
             _run_platform_packs(
                 args,
                 groups,
@@ -3275,9 +3277,9 @@ def _main(held: contextlib.ExitStack) -> None:
                 target_cores_cache,
                 system_filter,
             )
-        if args.verify_packs:
-            with _pack_output_lock(args.output_dir, exclusive=False):
-                _run_verify_packs(args)
+    if not args.manifest and args.verify_packs:
+        with _pack_output_lock(args.output_dir, exclusive=False):
+            _run_verify_packs(args)
 
 
 # Manifest generation (JSON inventory for install.py)
diff --git a/scripts/largefiles.py b/scripts/largefiles.py
index 24283a74..5089f44e 100644
--- a/scripts/largefiles.py
+++ b/scripts/largefiles.py
@@ -164,18 +164,15 @@ def _fetch_asset(
 
     if os.path.isdir(cached):
         return None
+    if os.path.exists(cached) and not (expected_sha1 or expected_md5):
+        return cached
     if os.path.exists(cached):
-        try:
-            hashes = compute_hashes(cached) if (expected_sha1 or expected_md5) else {}
-        except FileNotFoundError:
-            hashes = None
-        if hashes is None:
+        snapshot = _read_once(cached)
+        if snapshot is None:
             pass
-        elif not (expected_sha1 or expected_md5) or _matches(
-            hashes, expected_sha1, expected_md5
-        ):
+        elif _matches(snapshot[0], expected_sha1, expected_md5):
             return cached
-        elif not _replaced_on_release(name, cached, offline):
+        elif not _replaced_on_release(name, snapshot[0]["sha256"], snapshot[1], offline):
             # A copy of this asset that answers another hash: the caller
             # wants a different revision under the same name, and the
             # release still serves this one. Keeping it is what lets the
@@ -249,8 +246,32 @@ def _asset_urls(name: str) -> list[tuple[str, str]]:
     ]
 
 
-def _replaced_on_release(name: str, cached: str, offline: bool) -> bool:
-    """Whether the release now serves other bytes than the cached copy.
+def _read_once(path: str) -> tuple[dict[str, str], int] | None:
+    """Digests and size of the file at *path*, all read from one file, or
+    None when it is gone.
+
+    Every judgement on a cache copy reads this one snapshot. Hashed, then
+    hashed again by path for the release check, a copy another run promoted
+    in between answered the second question: the copy the caller wanted was
+    in the cache and the caller was told there was none.
+    """
+    # A promotion is an os.replace, so it changes the inode: the same inode
+    # on both sides of the read means the digests describe that one file.
+    for _attempt in range(3):
+        try:
+            before = os.stat(path)
+            hashes = compute_hashes(path)
+            after = os.stat(path)
+        except FileNotFoundError:
+            return None
+        if (before.st_ino, before.st_mtime_ns) == (after.st_ino, after.st_mtime_ns):
+            return hashes, after.st_size
+    return None
+
+
+def _replaced_on_release(name: str, sha256: str, size: int, offline: bool) -> bool:
+    """Whether the release now serves other bytes than the cached copy,
+    whose *sha256* and *size* the caller read.
 
     The release lists a sha256 per asset: a dump rebuilt at the same size
     (the eight 251658304-byte DSi NANDs) differs only there, and judged by
@@ -266,9 +287,9 @@ def _replaced_on_release(name: str, cached: str, offline: bool) -> bool:
         None,
     )
     if digest:
-        return compute_hashes(cached, frozenset({"sha256"}))["sha256"] != digest
+        return sha256 != digest
     served = _served_size(name)
-    return served is not None and served != os.path.getsize(cached)
+    return served is not None and served != size
 
 
 _digests_cache: dict[str, str] | None = None
diff --git a/scripts/refresh_data_dirs.py b/scripts/refresh_data_dirs.py
index 4f6464a8..d39e855d 100644
--- a/scripts/refresh_data_dirs.py
+++ b/scripts/refresh_data_dirs.py
@@ -23,6 +23,7 @@ import tempfile
 import urllib.error
 import urllib.request
 import zipfile
+from collections.abc import Iterator
 from pathlib import Path
 from artifacts import file_lock as _file_lock
 from common import github_token, platform_arg, require_platform, yaml_load
@@ -61,7 +62,34 @@ def cache_lock(
     swapped the tree shipped part of it, or nothing.
     """
     cache_dir = Path(cache_dir)
-    return _file_lock(cache_dir.with_name(f".{cache_dir.name}.lock"), shared=shared)
+    return _announced_lock(cache_dir.with_name(f".{cache_dir.name}.lock"), shared, cache_dir)
+
+
+@contextlib.contextmanager
+def _announced_lock(lock_path: Path, shared: bool, cache_dir: Path) -> Iterator[None]:
+    """file_lock, saying so when it has to wait.
+
+    A pipeline holds every cache for its whole run: a refresh started beside
+    it waited hours with nothing on screen.
+    """
+    try:
+        import fcntl
+    except ImportError:
+        with _file_lock(lock_path, shared=shared):
+            yield
+        return
+    lock_path.parent.mkdir(parents=True, exist_ok=True)
+    mode = fcntl.LOCK_SH if shared else fcntl.LOCK_EX
+    with open(lock_path, "a") as handle:
+        try:
+            fcntl.flock(handle, mode | fcntl.LOCK_NB)
+        except BlockingIOError:
+            log.warning("waiting for %s: another run holds it", cache_dir)
+            fcntl.flock(handle, mode)
+        try:
+            yield
+        finally:
+            fcntl.flock(handle, fcntl.LOCK_UN)
 
 
 def hold_data_dirs(stack: contextlib.ExitStack, registry: dict) -> None:
@@ -383,6 +411,14 @@ def _get_remote_etag(source_url: str) -> str | None:
         return None
 
 
+def _short_tag(tag: str | None) -> str:
+    """A commit sha or ETag cut for a log line, quotes dropped first: a
+    quoted ETag cut at 12 characters kept its opening quote only."""
+    if not tag:
+        return "none"
+    return tag.strip().removeprefix("W/").strip('"')[:12] or "none"
+
+
 def refresh_entry(
     key: str,
     entry: dict,
@@ -431,16 +467,17 @@ def _refresh_entry(
         needs_refresh = remote_tag != cached_tag
 
     if not needs_refresh:
-        log.info("[%s] up to date (tag: %s)", key, (cached_tag or "?")[:12])
+        log.info("[%s] up to date (tag: %s)", key, _short_tag(cached_tag))
         return False
 
     if dry_run:
-        log.info(
-            "[%s] would refresh (type: %s, cached: %s)",
-            key,
-            source_type,
-            cached_tag or "none",
-        )
+        if remote_tag is not None:
+            reason = f"cached: {_short_tag(cached_tag)}, remote: {_short_tag(remote_tag)}"
+        elif force:
+            reason = "forced"
+        else:
+            reason = "not cached"
+        log.info("[%s] would refresh (type: %s, %s)", key, source_type, reason)
         return True
 
     if remote_tag is None:
@@ -516,6 +553,16 @@ def refresh_all(
     return results
 
 
+def summarize(outcomes: dict[str, bool | None], dry_run: bool) -> str:
+    """One closing line: how many entries changed, were current, failed."""
+    refreshed = sum(1 for o in outcomes.values() if o is True)
+    current = sum(1 for o in outcomes.values() if o is False)
+    failed = sum(1 for o in outcomes.values() if o is None)
+    verb = "would refresh" if dry_run else "refreshed"
+    line = f"{len(outcomes)} entries: {refreshed} {verb}, {current} up to date"
+    return f"{line}, {failed} failed" if failed else line
+
+
 def main() -> None:
     parser = argparse.ArgumentParser(
         allow_abbrev=False,
@@ -567,6 +614,7 @@ def main() -> None:
             registry, force=args.force, dry_run=args.dry_run, platform=args.platform
         )
 
+    log.info(summarize(outcomes, args.dry_run))
     failed = sorted(key for key, outcome in outcomes.items() if outcome is None)
     if failed:
         log.error("refresh failed: %s", ", ".join(failed))
diff --git a/scripts/refresh_stale.py b/scripts/refresh_stale.py
index a0fbda40..fa951404 100755
--- a/scripts/refresh_stale.py
+++ b/scripts/refresh_stale.py
@@ -25,7 +25,8 @@ Mapping (stale -> command):
     catalogs/fbneo recipes  python -m scripts.scraper.romset_dat_importer
                             --source fbneo --fetch
 
-Surfaced only (no refresh): coreinfo gaps, redump/no-intro/tosec packs,
+Surfaced only (no refresh): data rows that are not a _data_dirs.yml key
+(the registry itself, buildbot assets it does not track), coreinfo gaps, redump/no-intro/tosec packs,
 CI pins (install.py SHA-256, PyPI, pinned actions), profile_sync. Each needs
 a human read (new .info file, manual DAT download, PyPI version bump).
 
@@ -46,12 +47,14 @@ import sys
 import time
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from dataclasses import dataclass
+from functools import lru_cache
 from pathlib import Path
 
 REPO_ROOT = Path(__file__).resolve().parents[1]
 LOG_DIR = REPO_ROOT / "tmp" / "refresh_stale"
 CHECK_FRESHNESS = REPO_ROOT / "scripts" / "check_freshness.py"
 PLATFORMS_REGISTRY = REPO_ROOT / "platforms" / "_registry.yml"
+DATA_DIRS_REGISTRY = REPO_ROOT / "platforms" / "_data_dirs.yml"
 
 AUTO_AREAS = ("platforms", "native", "targets", "data", "catalogs")
 MANUAL_AREAS = ("coreinfo", "ci", "profiles")
@@ -91,6 +94,15 @@ def _load_platform_registry() -> dict[str, dict]:
         return (yaml.safe_load(fh) or {}).get("platforms") or {}
 
 
+@lru_cache(maxsize=1)
+def _data_dir_keys() -> frozenset[str]:
+    """The entries refresh_data_dirs.py --key accepts."""
+    import yaml
+
+    with DATA_DIRS_REGISTRY.open(encoding="utf-8") as fh:
+        return frozenset((yaml.safe_load(fh) or {}).get("data_directories") or {})
+
+
 def _run_check_freshness(areas: tuple[str, ...], extra: list[str]) -> list[dict]:
     """Run check_freshness.py --json and return its findings."""
     cmd = [sys.executable, str(CHECK_FRESHNESS), "--json"]
@@ -246,8 +258,9 @@ def _command_for(
         ]
 
     if area == "data":
-        if subject == "_data_dirs.yml":
-            # The registry file itself cannot be refreshed, but its entries can.
+        if subject not in _data_dir_keys():
+            # "_data_dirs.yml" and "buildbot system" name the registry and
+            # what it does not track yet: a human adds the entry.
             return None
         return [
             sys.executable,
diff --git a/scripts/scraper/base_scraper.py b/scripts/scraper/base_scraper.py
index 8d6dd01b..6c87757e 100644
--- a/scripts/scraper/base_scraper.py
+++ b/scripts/scraper/base_scraper.py
@@ -163,6 +163,11 @@ def fetch_bytes(
 class BaseScraper(ABC):
     """Abstract base class for platform BIOS requirement scrapers."""
 
+    # False for a platform whose file list is inherited and whose scraper
+    # reads only its core list (RetroPie). Otherwise an empty read is an
+    # upstream that changed shape, never a platform with no file.
+    lists_files: bool = True
+
     def __init__(self, url: str = "") -> None:
         self.url = url
         self._raw_data: str | None = None
@@ -367,6 +372,12 @@ def scraper_cli(
         reqs = scraper.fetch_requirements()
     except (OSError, ValueError, RuntimeError) as e:
         _exit_on_scrape_error(e)
+    if scraper.lists_files and not reqs:
+        # Written, an empty read became a platform with no system that
+        # verify and the pack count 0/0 and call consistent.
+        _exit_on_scrape_error(RuntimeError(
+            f"{scraper_class.__module__}: upstream returned no BIOS entry"
+        ))
 
     if args.dry_run:
         by_system: dict[str, list] = {}
@@ -426,6 +437,12 @@ def scraper_cli(
                 if req.zipped_file:
                     entry["zipped_file"] = req.zipped_file
                 config["systems"][sys_id]["files"].append(entry)
+        if scraper.lists_files and not any(
+            (system or {}).get("files") for system in (config.get("systems") or {}).values()
+        ):
+            _exit_on_scrape_error(RuntimeError(
+                f"{scraper_class.__module__}: the generated platform lists no file"
+            ))
         # Merge into existing YAML: preserve fields the scraper doesn't generate
         # (data_directories, case_insensitive_fs, manually added metadata).
         # The scraper replaces systems + files, everything else is preserved.
diff --git a/scripts/scraper/fbneo_hash_scraper.py b/scripts/scraper/fbneo_hash_scraper.py
index 5f7902e4..b641be10 100644
--- a/scripts/scraper/fbneo_hash_scraper.py
+++ b/scripts/scraper/fbneo_hash_scraper.py
@@ -42,6 +42,8 @@ def _is_cache_fresh() -> bool:
         return False
     try:
         data = json.loads(CACHE_PATH.read_text(encoding="utf-8"))
+        if not data.get("bios_sets"):
+            return False
         fetched_at = datetime.fromisoformat(data["fetched_at"])
         return datetime.now(timezone.utc) - fetched_at < timedelta(hours=STALE_HOURS)
     except (json.JSONDecodeError, KeyError, ValueError):
@@ -178,6 +180,10 @@ def fetch_and_cache(force: bool = False) -> dict[str, Any]:
 
         log.info("parsing source tree")
         bios_sets = parse_fbneo_source_tree(str(CLONE_DIR))
+        if not bios_sets or not commit:
+            # An empty read was cached for a day and merged nothing, and
+            # the pipeline step reported OK.
+            raise RuntimeError(f"no BIOS set read at FBNeo {version} ({commit[:12]})")
 
         cache: dict[str, Any] = {
             "source": "finalburnneo/FBNeo",
diff --git a/scripts/scraper/mame_hash_scraper.py b/scripts/scraper/mame_hash_scraper.py
index 41ca3db3..3a5a850b 100644
--- a/scripts/scraper/mame_hash_scraper.py
+++ b/scripts/scraper/mame_hash_scraper.py
@@ -62,7 +62,7 @@ def _load_cache() -> dict[str, Any] | None:
 
 
 def _is_stale(cache: dict[str, Any] | None) -> bool:
-    if cache is None:
+    if cache is None or not cache.get("bios_sets"):
         return True
     fetched_at = cache.get("fetched_at")
     if not fetched_at:
@@ -292,6 +292,11 @@ def _fetch_hashes(force: bool) -> dict[str, Any]:
         bios_sets = parse_mame_source_tree(str(_CLONE_DIR))
         version = _parse_version_tag(tag)
         commit = _get_commit()
+        if not bios_sets or not commit:
+            # An empty read was cached for a day and every profile entry
+            # came out "out of scope", so nothing was refreshed and the
+            # pipeline step reported OK.
+            raise RuntimeError(f"no BIOS root set read at {tag}")
 
         data: dict[str, Any] = {
             "source": "mamedev/mame",
diff --git a/scripts/scraper/retropie_scraper.py b/scripts/scraper/retropie_scraper.py
index 14e791b0..14ef1ff9 100644
--- a/scripts/scraper/retropie_scraper.py
+++ b/scripts/scraper/retropie_scraper.py
@@ -59,6 +59,8 @@ _PACKAGE_DIRS = _SCRIPT_SECTIONS
 class Scraper(BaseScraper):
     """Scraper for the RetroPie package list."""
 
+    lists_files = False
+
     def __init__(self, url: str | None = None) -> None:
         # The package list is read from master: the commit read is recorded.
         if url is None:
@@ -122,6 +124,8 @@ class Scraper(BaseScraper):
                 else:
                     found.add(match.group(1))
 
+        if not found:
+            raise ValueError(f"{self.url}: no rp_module_id under {SCRIPTMODULES}/")
         self._modules = sorted(found)
         return self._modules
 
diff --git a/scripts/scraper/romset_dat_importer.py b/scripts/scraper/romset_dat_importer.py
index a75bd470..78ef91c0 100644
--- a/scripts/scraper/romset_dat_importer.py
+++ b/scripts/scraper/romset_dat_importer.py
@@ -15,7 +15,9 @@ in its repository, so both are fetched without a browser:
 
 Only sets the collection has a reason to know are kept, so the committed
 snapshot stays small: the archive names that emulator profiles or platform
-BIOS lists reference. ``--all`` keeps everything.
+BIOS lists reference, and the sets holding a dump-catalog entry the
+collection lacks (provenance_report names the set as where to find it).
+``--all`` keeps everything.
 
 Members without a CRC32 are undumped. A real romset does not carry them, so
 they are dropped from the recipe rather than disqualifying the whole set.
@@ -42,7 +44,7 @@ from ..common import (
     load_emulator_profiles,
     load_platform_config,
 )
-from ..dumpcatalog import build_snapshot, write_snapshot
+from ..dumpcatalog import build_snapshot, load_provenance_snapshots, write_snapshot
 from .logiqx_parser import LogiqxDat, parse_logiqx
 
 MAX_MEMBER_SIZE = 200 * 1024 * 1024
@@ -74,8 +76,45 @@ def relevant_archives(emulators_dir: str, platforms_dir: str) -> set[str]:
     return names
 
 
+Targets = dict[tuple[str, int], set[str]]
+
+
+def catalog_targets(provenance_dir: str, db_path: str) -> Targets:
+    """(crc32, size) -> sha1 of each dump-catalog entry the collection lacks.
+
+    fm7740sx carries DICROM.rom, EXTSUB.rom and KANJI2.rom, which No-Intro
+    lists and the collection misses: filtered on archive names alone, the
+    snapshot never held the set and the missing report named no source.
+    """
+    with open(db_path, encoding="utf-8") as handle:
+        held = set(json.load(handle).get("files", {}))
+    targets: Targets = {}
+    for snapshot in load_provenance_snapshots(provenance_dir).values():
+        for entry in snapshot.get("entries", []):
+            crc, size = str(entry.get("crc32") or "").lower(), entry.get("size")
+            sha1 = str(entry.get("sha1") or "").lower()
+            if not crc or size is None or (sha1 and sha1 in held):
+                continue
+            targets.setdefault((crc.zfill(8), int(size)), set()).add(sha1)
+    return targets
+
+
+def holds_target(members: list[dict], targets: Targets | None) -> bool:
+    """Whether a set carries a missing catalog dump. A sha1 on both sides
+    must agree: crc32 and size alone collide across 40 000 ROMs."""
+    if not targets:
+        return False
+    for member in members:
+        key = (str(member.get("crc32") or "").lower().zfill(8), int(member.get("size") or 0))
+        wanted = targets.get(key)
+        sha1 = str(member.get("sha1") or "").lower()
+        if wanted is not None and (not sha1 or "" in wanted or sha1 in wanted):
+            return True
+    return False
+
+
 def recipe_entries(
-    dat: LogiqxDat, keep: set[str] | None = None
+    dat: LogiqxDat, keep: set[str] | None = None, targets: Targets | None = None
 ) -> list[dict]:
     """Group a parsed DAT into one recipe per set."""
     by_set: dict[str, list] = {}
@@ -87,7 +126,9 @@ def recipe_entries(
     entries: list[dict] = []
     for set_name, roms in sorted(by_set.items()):
         archive = f"{set_name}.zip"
-        if keep is not None and archive not in keep:
+        if keep is not None and archive not in keep and not holds_target(
+            [{"crc32": r.crc32, "size": r.size, "sha1": r.sha1} for r in roms], targets
+        ):
             continue
         entries.append(
             {
@@ -149,9 +190,12 @@ def _machine_roms(blob: bytes) -> list[dict]:
 
 
 def _scan_listxml(
-    stream: io.BufferedIOBase, selector: Callable[[str], bool]
+    stream: io.BufferedIOBase,
+    selector: Callable[[str], bool],
+    targets: Targets | None = None,
 ) -> dict[str, tuple[str | None, list[dict]]]:
-    """Stream a MAME -listxml document, keeping the machines *selector* wants.
+    """Stream a MAME -listxml document, keeping the machines *selector* wants
+    and those holding one of *targets*.
 
     The document is 311 MB for MAME 0.289, so it is never held whole: the
     reader keeps a sliding window just large enough to close the element it
@@ -170,19 +214,22 @@ def _scan_listxml(
             if end == -1:
                 break
             name = match.group(1).decode()
-            if selector(name):
-                parent = _ROMOF.search(match.group(2).decode())
-                found[name] = (
-                    parent.group(1) if parent else None,
-                    _machine_roms(buffer[match.end() : end]),
-                )
+            wanted = selector(name)
+            if wanted or targets:
+                roms = _machine_roms(buffer[match.end() : end])
+                if wanted or holds_target(roms, targets):
+                    parent = _ROMOF.search(match.group(2).decode())
+                    found[name] = (parent.group(1) if parent else None, roms)
             position = end + len(b"</machine>")
         buffer = buffer[position:] if position else buffer[-(2 * LISTXML_CHUNK) :]
     return found
 
 
 def listxml_entries(
-    open_stream: Callable[[], io.BufferedIOBase], label: str, keep: set[str] | None
+    open_stream: Callable[[], io.BufferedIOBase],
+    label: str,
+    keep: set[str] | None,
+    targets: Targets | None = None,
 ) -> list[dict]:
     """Recipes from a MAME -listxml document, parents resolved.
 
@@ -193,7 +240,7 @@ def listxml_entries(
     """
     with open_stream() as stream:
         wanted = _scan_listxml(
-            stream, lambda name: keep is None or f"{name}.zip" in keep
+            stream, lambda name: keep is None or f"{name}.zip" in keep, targets
         )
     requested = set(wanted)
     parents = {
@@ -484,6 +531,15 @@ def main() -> int:
     parser.add_argument(
         "--all", action="store_true", help="keep every set, not only referenced ones"
     )
+    parser.add_argument(
+        "--provenance-dir", default="provenance",
+        help="dump catalogs whose missing entries keep the sets holding them "
+             "(default: %(default)s)",
+    )
+    parser.add_argument(
+        "--db", default="database.json",
+        help="collection database the catalogs are compared with (default: %(default)s)",
+    )
     parser.add_argument(
         "--dry-run", action="store_true",
         help="print what would change and write nothing",
@@ -511,6 +567,7 @@ def main() -> int:
         if args.all
         else relevant_archives(args.emulators_dir, args.platforms_dir)
     )
+    targets = None if args.all else catalog_targets(args.provenance_dir, args.db)
 
     dats: dict[str, str] = {}
     entries: list[dict] = []
@@ -518,7 +575,7 @@ def main() -> int:
 
     if _is_listxml(pack):
         label = f"MAME {pack.stem.replace('lx', '')}"
-        entries = listxml_entries(_listxml_opener(pack), label, keep)
+        entries = listxml_entries(_listxml_opener(pack), label, keep, targets)
         dats[label] = pack.stem
         print(f"  {label}: {len(entries)} sets retenus")
         members = sum(len(entry["members"]) for entry in entries)
@@ -539,7 +596,7 @@ def main() -> int:
         if not dat.roms:
             skipped += 1
             continue
-        found = recipe_entries(dat, keep)
+        found = recipe_entries(dat, keep, targets)
         if not found:
             continue
         dats[dat.name or member] = dat.version
diff --git a/scripts/scraper/targets/__init__.py b/scripts/scraper/targets/__init__.py
index 21339b34..08381331 100644
--- a/scripts/scraper/targets/__init__.py
+++ b/scripts/scraper/targets/__init__.py
@@ -43,6 +43,7 @@ class BaseTargetScraper(ABC):
             r"^https://raw\.githubusercontent\.com/[^/]+/[^/]+/([^/]+)/",
             r"^https://github\.com/[^/]+/[^/]+/(?:blob|tree)/([^/]+)/",
             r"^https://gitlab\.com/.+?/-/(?:raw|blob|tree)/([^/]+)/",
+            r"^https://codeload\.github\.com/[^/]+/[^/]+/(?:tar\.gz|zip)/([^/]+)$",
         ):
             match = re.match(pattern, source)
             if match:
diff --git a/scripts/scraper/targets/emudeck_targets_scraper.py b/scripts/scraper/targets/emudeck_targets_scraper.py
index 7eb1d250..0e69d055 100644
--- a/scripts/scraper/targets/emudeck_targets_scraper.py
+++ b/scripts/scraper/targets/emudeck_targets_scraper.py
@@ -1,8 +1,11 @@
 """Scraper for EmuDeck emulator targets.
 
 Sources:
-  SteamOS: dragoonDorise/EmuDeck, functions/EmuScripts/*.sh
-  Windows: EmuDeck/emudeck-we, functions/EmuScripts/*.ps1
+  SteamOS: dragoonDorise/EmuDeck, functions/EmuScripts/*.sh, read at the
+           revision platforms/emudeck.yml was scraped at
+  Windows: EmuDeck/emudeck-we, functions/EmuScripts/*.ps1, default branch:
+           the platform file is read from dragoonDorise/EmuDeck alone and
+           pins no emudeck-we revision
 """
 
 from __future__ import annotations
@@ -89,8 +92,18 @@ def _script_to_core(filename: str) -> str | None:
 class Scraper(BaseTargetScraper):
     """Fetches emulator lists for EmuDeck SteamOS and Windows targets."""
 
-    def __init__(self, url: str = "https://github.com/dragoonDorise/EmuDeck") -> None:
+    def __init__(
+        self, url: str = "https://github.com/dragoonDorise/EmuDeck", revision: str | None = None
+    ) -> None:
         super().__init__(url=url)
+        self._revision = revision
+
+    @property
+    def revision(self) -> str:
+        """The checkBIOS.sh commit platforms/emudeck.yml was read at."""
+        if self._revision is None:
+            self._revision = self.pinned_revision(PLATFORM_NAME)
+        return self._revision
 
     def _fetch_cores_for_target(
         self, api_url: str, label: str, arch: str = "x86_64"
@@ -141,7 +154,9 @@ class Scraper(BaseTargetScraper):
         raise RuntimeError(f"no {arch} core list in {target_path}")
 
     def fetch_targets(self) -> dict:
-        steamos_cores = self._fetch_cores_for_target(STEAMOS_API, "SteamOS")
+        steamos_cores = self._fetch_cores_for_target(
+            f"{STEAMOS_API}?ref={self.revision}", "SteamOS"
+        )
         windows_cores = self._fetch_cores_for_target(WINDOWS_API, "Windows")
 
         targets: dict[str, dict] = {}
@@ -158,7 +173,7 @@ class Scraper(BaseTargetScraper):
 
         return {
             "platform": "emudeck",
-            "source": self.url,
+            "source": f"{self.url}/tree/{self.revision}",
             "scraped_at": datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ"),
             "targets": targets,
         }
diff --git a/scripts/scraper/targets/retropie_targets_scraper.py b/scripts/scraper/targets/retropie_targets_scraper.py
index 7701aa5b..304ef856 100644
--- a/scripts/scraper/targets/retropie_targets_scraper.py
+++ b/scripts/scraper/targets/retropie_targets_scraper.py
@@ -1,6 +1,7 @@
 """Scraper for RetroPie package availability per platform.
 
-Source: https://github.com/RetroPie/RetroPie-Setup/tree/master/scriptmodules
+Source: https://github.com/RetroPie/RetroPie-Setup/tree/<rev>/scriptmodules,
+read at the revision platforms/retropie.yml was scraped at.
 Parses rp_module_id and rp_module_flags from each scriptmodule of the
 package sections the platform list reads (emulators, libretrocores, ports)
 to determine which platforms each package supports.
@@ -26,7 +27,7 @@ GITHUB_API_URL = (
     "https://api.github.com/repos/RetroPie/RetroPie-Setup/contents/scriptmodules"
 )
 RAW_BASE_URL = (
-    "https://raw.githubusercontent.com/RetroPie/RetroPie-Setup/master/scriptmodules/"
+    "https://raw.githubusercontent.com/RetroPie/RetroPie-Setup/{rev}/scriptmodules/"
 )
 # The sections the platform scraper reads: a standalone package missing here
 # is filtered out of every targeted pack.
@@ -114,14 +115,23 @@ def _parse_module(content: str) -> tuple[str | None, str]:
 class Scraper(BaseTargetScraper):
     """Fetches RetroPie package availability by parsing scriptmodules."""
 
-    def __init__(self, url: str = GITHUB_API_URL) -> None:
+    def __init__(self, url: str = GITHUB_API_URL, revision: str | None = None) -> None:
         super().__init__(url=url)
+        self._revision = revision
+
+    @property
+    def revision(self) -> str:
+        """The commit the package list was read at: the flags of another
+        revision filter packages the platform file does not describe."""
+        if self._revision is None:
+            self._revision = self.pinned_revision(PLATFORM_NAME)
+        return self._revision
 
     def _list_scriptmodules(self) -> list[str]:
         """Return section/filename for every .sh of the package sections."""
         names: list[str] = []
         for section in PACKAGE_DIRS:
-            url = f"{self.url}/{section}"
+            url = f"{self.url}/{section}?ref={self.revision}"
             entries = json.loads(_fetch(url, accept="application/vnd.github+json"))
             listed = [
                 f"{section}/{e['name']}" for e in entries if e.get("name", "").endswith(".sh")
@@ -132,7 +142,7 @@ class Scraper(BaseTargetScraper):
         return names
 
     def _fetch_module(self, filename: str) -> str:
-        return _fetch(f"{RAW_BASE_URL}{filename}")
+        return _fetch(f"{RAW_BASE_URL.format(rev=self.revision)}{filename}")
 
     def fetch_targets(self) -> dict:
         print("  listing RetroPie scriptmodules...", file=sys.stderr)
@@ -170,7 +180,7 @@ class Scraper(BaseTargetScraper):
 
         return {
             "platform": "retropie",
-            "source": self.url,
+            "source": f"{self.url}?ref={self.revision}",
             "scraped_at": datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ"),
             "targets": targets,
         }
diff --git a/tests/test_artifact_lock.py b/tests/test_artifact_lock.py
index 905db767..03f37a77 100644
--- a/tests/test_artifact_lock.py
+++ b/tests/test_artifact_lock.py
@@ -110,6 +110,36 @@ class PackLockCliTest(unittest.TestCase):
         self.assertEqual(proc.returncode, 1, proc.stdout + proc.stderr)
         self.assertIn("is in use by another run", proc.stdout)
 
+    def test_a_held_output_is_refused_before_the_data_refresh(self):
+        """The refresh waits for every run holding a data tree, and a
+        pipeline holds them all for its whole run: probed after the refresh,
+        a second build sat silent for hours instead of being refused."""
+        from refresh_data_dirs import cache_lock  # noqa: PLC0415
+
+        platforms = Path(self.dir) / "platforms"
+        platforms.mkdir()
+        for name in ("_registry.yml", "_shared.yml", "misterfpga.yml"):
+            shutil.copyfile(REPO_ROOT / "platforms" / name, platforms / name)
+        cache = Path(self.dir) / "cache" / "probe"
+        cache.mkdir(parents=True)
+        (platforms / "_data_dirs.yml").write_text(
+            "data_directories:\n  probe:\n    source_type: zip\n"
+            f"    source_url: https://example.invalid/probe.zip\n"
+            f"    local_cache: {cache}\n"
+        )
+        output = Path(self.dir) / "out"
+        with artifact_lock(str(output)), cache_lock(cache):
+            try:
+                proc = subprocess.run(
+                    [sys.executable, "scripts/generate_pack.py", "--platform", "misterfpga",
+                     "--platforms-dir", str(platforms), "--output-dir", str(output)],
+                    capture_output=True, text=True, cwd=str(REPO_ROOT), timeout=120,
+                )
+            except subprocess.TimeoutExpired:
+                self.fail("generate_pack waited on the data tree instead of refusing")
+        self.assertEqual(proc.returncode, 1, proc.stdout + proc.stderr)
+        self.assertIn("is in use by another run", proc.stdout)
+
     def test_every_writing_mode_refuses_a_locked_output(self):
         """Two of seven modes took the lock, and five wrote straight into it.
 
diff --git a/tests/test_check_freshness.py b/tests/test_check_freshness.py
index 30ecf390..a0c36df1 100644
--- a/tests/test_check_freshness.py
+++ b/tests/test_check_freshness.py
@@ -87,6 +87,25 @@ class NativeCacheTests(unittest.TestCase):
         self.assertEqual({r.status for r in rows}, {cf.STALE})
         self.assertIn("batocera", {r.subject for r in rows})
 
+    def test_the_model_build_notes_stay_out_of_the_report(self):
+        """generate_truth reports how two cores' hashes were settled. Under
+        `--only native` they opened the report and named no step to take."""
+        import contextlib
+        import io
+
+        def noisy(truth, scraped):
+            print("WARNING: hash conflict for GameIndex.yaml (sha1: a vs b, core yaps2)",
+                  file=sys.stderr)
+            print("other diagnostic", file=sys.stderr)
+            return {}, None
+
+        err = io.StringIO()
+        with mock.patch.object(cf, "build_native_model", side_effect=noisy), \
+                contextlib.redirect_stderr(err):
+            cf.check_native(REPO_ROOT / "platforms", self.cache, self.cache / "truth")
+        self.assertNotIn("hash conflict", err.getvalue())
+        self.assertIn("other diagnostic", err.getvalue())
+
 
 class PublishedExportTests(unittest.TestCase):
     """exports/ is committed and published, and CI cannot rebuild it."""
@@ -165,6 +184,32 @@ class PlatformDiffTests(unittest.TestCase):
         self.assertEqual(diff.cores_removed, ["b"])
         self.assertIn("+cores 2", diff.summary())
 
+    def test_every_other_scraped_field_is_a_change(self):
+        """launchers feed verify, dual_mode_cores the grouping, a system's
+        data_directories the pack: a rescrape that moves only them is stale."""
+        old = self._platform()
+        old["launchers"] = [{"emulator": "e"}]
+        old["dual_mode_cores"] = ["flycast"]
+        old["systems"]["sys"].update(core="c1", native_id="psx",
+                                     data_directories=[{"ref": "x"}])
+        new = self._platform()
+        new["launchers"] = []
+        new["systems"]["sys"].update(core="c2", native_id="psx")
+        diff = cf.diff_platform(old, new)
+        self.assertTrue(diff.content_changed)
+        self.assertEqual(
+            diff.fields_changed,
+            ["dual_mode_cores", "launchers", "sys/core", "sys/data_directories"],
+        )
+        self.assertIn("~fields 4", diff.summary())
+
+    def test_the_revision_read_alone_is_not_a_change(self):
+        old, new = self._platform(), self._platform()
+        old["source"], new["source"] = "https://x/tar.gz/aaa", "https://x/tar.gz/bbb"
+        old["launchers"] = [{"emulator": "e", "source_ref": "es_features.cfg:11638-11646"}]
+        new["launchers"] = [{"emulator": "e", "source_ref": "es_features.cfg:11649-11657"}]
+        self.assertFalse(cf.diff_platform(old, new).changed)
+
     def test_target_stamp_is_not_a_change(self):
         old = {"scraped_at": "2026-01-01", "targets": {"t": {"cores": ["a"]}}}
         new = {"scraped_at": "2026-02-01", "targets": {"t": {"cores": ["a"]}}}
@@ -240,6 +285,36 @@ class CoreResolutionTests(unittest.TestCase):
         self.assertEqual(unprofiled, ["wqxemu"])
         self.assertEqual(standalone, [("eka2l1", "eka2l1")])
 
+    def test_a_changed_info_of_a_profiled_core_is_stale(self):
+        """A firmwareN_path added to a profiled core's .info changes its blob:
+        the names alone said OK."""
+        blobs = {"mednafen_psx": "new", "eka2l1": "same", "wqxemu": "other"}
+        recorded = {"mednafen_psx": "old", "eka2l1": "same"}
+        with tempfile.TemporaryDirectory() as tmp:
+            record = Path(tmp) / "_core_info.json"
+            record.write_text(cf.json.dumps({"blobs": recorded}))
+            with mock.patch.object(cf, "core_info_blobs", return_value=blobs):
+                rows = cf.check_coreinfo(self.PROFILES, "", True, record)
+        stale = {r.subject: r for r in rows if r.status == cf.STALE}
+        self.assertIn("mednafen_psx", stale)
+        self.assertIn("--record-coreinfo mednafen_psx", stale["mednafen_psx"].detail)
+        self.assertNotIn(".info changed", stale["eka2l1"].detail)
+        self.assertEqual(cf.coreinfo_drift(blobs, recorded, self.PROFILES), ["mednafen_psx"])
+
+    def test_recording_a_core_leaves_the_others_unread(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            record = Path(tmp) / "_core_info.json"
+            record.write_text(cf.json.dumps({"blobs": {"a": "1", "b": "1"}}))
+            cf.record_core_info({"a": "2", "b": "2"}, ["a"], record)
+            self.assertEqual(cf.load_core_info_record(record), {"a": "2", "b": "1"})
+            with self.assertRaises(ValueError):
+                cf.record_core_info({"a": "2"}, ["ghost"], record)
+
+    def test_the_committed_record_holds_git_blobs(self):
+        recorded = cf.load_core_info_record()
+        self.assertIsNotNone(recorded)
+        self.assertTrue(all(len(sha) == 40 for sha in recorded.values()))
+
 
 class PinParsingTests(unittest.TestCase):
     WORKFLOW = """
diff --git a/tests/test_hash_merge.py b/tests/test_hash_merge.py
index 275a07bc..250b7290 100644
--- a/tests/test_hash_merge.py
+++ b/tests/test_hash_merge.py
@@ -356,7 +356,8 @@ class TheScraperClonesTheReleaseItLabels(unittest.TestCase):
         with mock.patch.object(scraper, "_get_release_tag", return_value="mame0289"), \
                 mock.patch.object(scraper, "_run_git",
                                   side_effect=lambda args, cwd=None: calls.append(args)), \
-                mock.patch.object(scraper, "parse_mame_source_tree", return_value={}), \
+                mock.patch.object(scraper, "parse_mame_source_tree",
+                                  return_value={"neogeo": {"roms": []}}), \
                 mock.patch.object(scraper, "_get_commit", return_value="c" * 40), \
                 mock.patch.object(scraper, "_write_cache"), \
                 mock.patch.object(scraper, "_cleanup"), \
diff --git a/tests/test_large_file_cache.py b/tests/test_large_file_cache.py
index 9fa948c6..54a322cf 100644
--- a/tests/test_large_file_cache.py
+++ b/tests/test_large_file_cache.py
@@ -691,7 +691,10 @@ class ASameSizeReuploadIsSeen(unittest.TestCase):
     def replaced(self, digests: dict, size: int | None) -> bool:
         with mock.patch.object(largefiles, "_served_digests", lambda: digests), \
                 mock.patch.object(largefiles, "_served_size", lambda name: size):
-            return largefiles._replaced_on_release("dsi_nand.bin", str(self.cached), False)
+            return largefiles._replaced_on_release(
+                "dsi_nand.bin", hashlib.sha256(self.cached.read_bytes()).hexdigest(),
+                self.cached.stat().st_size, False,
+            )
 
     def test_the_digest_decides(self):
         same = hashlib.sha256(b"OLD NAND").hexdigest()
@@ -703,6 +706,30 @@ class ASameSizeReuploadIsSeen(unittest.TestCase):
         self.assertFalse(self.replaced({}, 8))
         self.assertTrue(self.replaced({}, 9))
 
+    def test_a_copy_promoted_during_the_check_is_the_one_judged(self):
+        """Another run promotes the served revision while this one hashes the
+        stale copy: the release check reread the path, found the served
+        bytes, and the caller was told the cache held no such file."""
+        new = b"NEW NAND"
+        real = largefiles.compute_hashes
+
+        def promote_while_hashing(path, *args, **kwargs):
+            result = real(path, *args, **kwargs)
+            if Path(path).read_bytes() != new:
+                promoted = self.dir / "promoted.tmp"
+                promoted.write_bytes(new)
+                os.replace(promoted, self.cached)
+            return result
+
+        digests = {"dsi_nand.bin": hashlib.sha256(new).hexdigest()}
+        with mock.patch.object(largefiles, "compute_hashes", promote_while_hashing), \
+                mock.patch.object(largefiles, "_served_digests", lambda: digests):
+            found = largefiles._fetch_asset(
+                "dsi_nand.bin", str(self.dir), hashlib.sha1(new).hexdigest(), "",
+                offline=False,
+            )
+        self.assertEqual(found, str(self.cached))
+
     def test_the_release_check_compares_digests_at_equal_size(self):
         expected = {"bios/Nintendo/DSi/dsi_nand.bin": 8}
         assets = {"dsi_nand.bin": 8}
diff --git a/tests/test_refresh_data_dirs.py b/tests/test_refresh_data_dirs.py
index 4727289a..22f31c59 100644
--- a/tests/test_refresh_data_dirs.py
+++ b/tests/test_refresh_data_dirs.py
@@ -166,5 +166,63 @@ class EmulatorPackHoldsTheCache(unittest.TestCase):
             self.assertEqual(held, [True])
 
 
+class AWaitIsAnnounced(unittest.TestCase):
+    def test_a_held_tree_is_named_before_the_wait(self):
+        """A pipeline holds every tree for its run: the refresh beside it
+        waited with nothing on screen."""
+        with tempfile.TemporaryDirectory() as tmp:
+            cache = Path(tmp) / "probe"
+            taken = threading.Event()
+
+            def second_run() -> None:
+                with rdd.cache_lock(cache):
+                    taken.set()
+
+            with self.assertLogs(rdd.log, "WARNING") as logs:
+                with rdd.cache_lock(cache):
+                    worker = threading.Thread(target=second_run)
+                    worker.start()
+                    for _ in range(100):
+                        if logs.output:
+                            break
+                        threading.Event().wait(0.05)
+                    self.assertFalse(taken.is_set())
+                worker.join(10)
+            self.assertTrue(taken.is_set())
+            self.assertIn("waiting for", logs.output[0])
+            self.assertIn("probe", logs.output[0])
+
+
+class DryRunReport(unittest.TestCase):
+    """What a dry run says: why each entry would be fetched, and how many."""
+
+    def test_a_quoted_etag_is_cut_without_its_quotes(self):
+        self.assertEqual(rdd._short_tag('"0x8DF0B72EB52A1C0"'), "0x8DF0B72EB5")
+        self.assertEqual(rdd._short_tag('W/"2685251384"'), "2685251384")
+        self.assertEqual(rdd._short_tag(None), "none")
+
+    def test_the_remote_tag_is_shown_beside_the_cached_one(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            versions = Path(tmp) / "versions.json"
+            versions.write_text(json.dumps({"k": {"etag": '"2725165595"'}}))
+            entry = {"source_type": "zip", "source_url": "https://x.invalid/a.zip",
+                     "local_cache": tmp}
+            with mock.patch.object(rdd, "_get_remote_etag", return_value='"2685251384"'), \
+                    self.assertLogs(rdd.log, "INFO") as logs:
+                self.assertTrue(rdd.refresh_entry("k", entry, dry_run=True,
+                                                  versions_path=str(versions)))
+        self.assertIn("cached: 2725165595, remote: 2685251384", logs.output[0])
+
+    def test_a_run_ends_on_its_counts(self):
+        self.assertEqual(
+            rdd.summarize({"a": True, "b": False, "c": False}, dry_run=True),
+            "3 entries: 1 would refresh, 2 up to date",
+        )
+        self.assertEqual(
+            rdd.summarize({"a": True, "b": None}, dry_run=False),
+            "2 entries: 1 refreshed, 0 up to date, 1 failed",
+        )
+
+
 if __name__ == "__main__":
     unittest.main()
diff --git a/tests/test_refresh_stale.py b/tests/test_refresh_stale.py
index 691f9f9a..3b7b01eb 100644
--- a/tests/test_refresh_stale.py
+++ b/tests/test_refresh_stale.py
@@ -101,6 +101,16 @@ class Planning(unittest.TestCase):
         )
         self.assertEqual([f["subject"] for f in surfaced], ["redump"])
 
+    def test_a_data_row_outside_the_registry_needs_a_human(self):
+        """refresh_data_dirs.py --key 'buildbot system' exits 1 on an unknown
+        key: the row asks for a registry entry, not a refresh."""
+        jobs, surfaced, _ = self._plan(
+            finding("data", "buildbot system"), finding("data", "_data_dirs.yml")
+        )
+        self.assertEqual(jobs, [])
+        self.assertEqual([f["subject"] for f in surfaced],
+                         ["buildbot system", "_data_dirs.yml"])
+
     def test_only_stale_rows_run_and_errors_are_shown(self):
         jobs, surfaced, ignored = self._plan(
             finding("data", "a", "OK"),
diff --git a/tests/test_romset_recipes.py b/tests/test_romset_recipes.py
index 37d2d3a7..3e5d30ed 100644
--- a/tests/test_romset_recipes.py
+++ b/tests/test_romset_recipes.py
@@ -28,7 +28,9 @@ from romset_recipes import (  # noqa: E402
     write_reconstructions,
 )
 from scripts.scraper.romset_dat_importer import (  # noqa: E402
+    catalog_targets,
     compact_entries,
+    holds_target,
     listxml_entries,
     git_blob_sha,
     merge_snapshot,
@@ -386,6 +388,32 @@ class ListXmlRecipes(unittest.TestCase):
             [m["name"] for m in entries[0]["members"]], ["own.rom", "shared.rom"]
         )
 
+    def test_a_set_holding_a_missing_catalog_dump_is_kept(self):
+        """fm7740sx carries three No-Intro dumps the collection lacks. No
+        profile names it, so the missing report named no place to find them."""
+        targets = {(_crc(ROM_B), len(ROM_B)): {""}}
+        entries = listxml_entries(
+            self._opener(self._document()), "MAME 0.289", {"other.zip"}, targets
+        )
+        self.assertEqual([entry["name"] for entry in entries], ["childset.zip"])
+
+    def test_a_catalog_sha1_must_agree(self):
+        member = {"crc32": _crc(ROM_B), "size": len(ROM_B), "sha1": "a" * 40}
+        self.assertFalse(holds_target([member], {(_crc(ROM_B), len(ROM_B)): {"b" * 40}}))
+        self.assertTrue(holds_target([member], {(_crc(ROM_B), len(ROM_B)): {"a" * 40}}))
+
+    def test_catalog_targets_leave_out_what_the_collection_holds(self):
+        with tempfile.TemporaryDirectory(dir=TMP_ROOT) as directory:
+            root = Path(directory)
+            (root / "prov").mkdir()
+            (root / "prov" / "tosec.json").write_text(json.dumps({"source": "tosec", "entries": [
+                {"name": "held.rom", "crc32": "1", "size": 4, "sha1": "a" * 40},
+                {"name": "lacked.rom", "crc32": "2", "size": 4, "sha1": "b" * 40},
+            ]}))
+            (root / "db.json").write_text(json.dumps({"files": {"a" * 40: {}}}))
+            targets = catalog_targets(str(root / "prov"), str(root / "db.json"))
+        self.assertEqual(targets, {("00000002", 4): {"b" * 40}})
+
     def test_upstream_blobs_are_recorded_and_replaced(self):
         """The snapshot names the DAT blobs it was read from, so a later
         check can tell whether upstream moved without importing again."""
diff --git a/tests/test_scraper_contract.py b/tests/test_scraper_contract.py
index a252fb72..6df589b5 100644
--- a/tests/test_scraper_contract.py
+++ b/tests/test_scraper_contract.py
@@ -882,5 +882,127 @@ class OneNativeIdOneSystem(unittest.TestCase):
                 ids = {_norm_system_id(s) for s in data["systems"]}
                 self.assertEqual(wanted & ids & machines, wanted)
 
+
+class HashScraperRefusesAnEmptyRead(unittest.TestCase):
+    """A source tree that yields no BIOS set is never cached as a result.
+
+    Cached, it was served for a day: every profile entry came out "out of
+    scope", nothing was refreshed and pipeline steps 2a and 2a2 said OK.
+    """
+
+    def _fresh(self, sets: dict) -> dict:
+        from datetime import datetime, timezone  # noqa: PLC0415
+
+        return {"fetched_at": datetime.now(timezone.utc).isoformat(),
+                "commit": "abc", "bios_sets": sets}
+
+    def test_mame_raises_and_writes_no_cache(self):
+        from scraper import mame_hash_scraper as m  # noqa: PLC0415
+
+        with tempfile.TemporaryDirectory() as tmp:
+            cache = Path(tmp) / "mame-hashes.json"
+            with mock.patch.object(m, "_CACHE_PATH", cache), \
+                    mock.patch.object(m, "_get_release_tag", return_value="mame0289"), \
+                    mock.patch.object(m, "_sparse_clone"), \
+                    mock.patch.object(m, "_cleanup"), \
+                    mock.patch.object(m, "_get_commit", return_value="abc"), \
+                    mock.patch.object(m, "parse_mame_source_tree", return_value={}):
+                with self.assertRaises(RuntimeError):
+                    m._fetch_hashes(force=True)
+            self.assertFalse(cache.exists())
+
+    def test_mame_does_not_serve_an_empty_cache(self):
+        from scraper import mame_hash_scraper as m  # noqa: PLC0415
+
+        self.assertTrue(m._is_stale(self._fresh({})))
+        self.assertFalse(m._is_stale(self._fresh({"neogeo": {}})))
+
+    def test_fbneo_raises_and_writes_no_cache(self):
+        from scraper import fbneo_hash_scraper as f  # noqa: PLC0415
+
+        with tempfile.TemporaryDirectory() as tmp:
+            cache = Path(tmp) / "fbneo-hashes.json"
+            with mock.patch.object(f, "CACHE_PATH", cache), \
+                    mock.patch.object(f, "_sparse_clone"), \
+                    mock.patch.object(f, "_cleanup"), \
+                    mock.patch.object(f, "_extract_version", return_value=("v1.0.0.03", "abc")), \
+                    mock.patch.object(f, "parse_fbneo_source_tree", return_value={}):
+                with self.assertRaises(RuntimeError):
+                    f.fetch_and_cache(force=True)
+            self.assertFalse(cache.exists())
+
+    def test_fbneo_does_not_serve_an_empty_cache(self):
+        from scraper import fbneo_hash_scraper as f  # noqa: PLC0415
+
+        with tempfile.TemporaryDirectory() as tmp:
+            cache = Path(tmp) / "fbneo-hashes.json"
+            with mock.patch.object(f, "CACHE_PATH", cache):
+                cache.write_text(json.dumps(self._fresh({})))
+                self.assertFalse(f._is_cache_fresh())
+                cache.write_text(json.dumps(self._fresh({"neogeo": {}})))
+                self.assertTrue(f._is_cache_fresh())
+
+
+
+class EmptyScrapeWritesNothing(unittest.TestCase):
+    """An upstream that changed shape parses to nothing: the run fails and
+    the committed platform file stays as it was."""
+
+    def _run(self, scraper_class, output: Path) -> int:
+        from scraper.base_scraper import scraper_cli  # noqa: PLC0415
+
+        argv = ["scraper", "-o", str(output)]
+        with mock.patch.object(sys, "argv", argv), \
+                mock.patch("sys.stderr", new_callable=io.StringIO):
+            try:
+                scraper_cli(scraper_class)
+            except SystemExit as exc:
+                return int(exc.code or 0)
+        return 0
+
+    def test_no_requirement_exits_non_zero(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            output = Path(tmp) / "platform.yml"
+            output.write_text("systems:\n  a:\n    files:\n    - name: x\n")
+            self.assertEqual(self._run(_StubScraper, output), 1)
+            self.assertIn("name: x", output.read_text())
+
+    def test_a_generated_file_without_files_exits_non_zero(self):
+        class NoSystems(_StubScraper):
+            def __init__(self):
+                super().__init__([BiosRequirement(name="a.bin", system="s")])
+
+            def generate_platform_yaml(self) -> dict:
+                return {"platform": "x", "systems": {}}
+
+        with tempfile.TemporaryDirectory() as tmp:
+            output = Path(tmp) / "platform.yml"
+            self.assertEqual(self._run(NoSystems, output), 1)
+            self.assertFalse(output.exists())
+
+    def test_a_platform_that_inherits_its_files_may_list_none(self):
+        class CoresOnly(_StubScraper):
+            lists_files = False
+
+            def generate_platform_yaml(self) -> dict:
+                return {"inherits": "retroarch", "cores": ["mgba"]}
+
+        with tempfile.TemporaryDirectory() as tmp:
+            output = Path(tmp) / "platform.yml"
+            with mock.patch("sys.stdout", new_callable=io.StringIO):
+                self.assertEqual(self._run(CoresOnly, output), 0)
+            self.assertIn("mgba", output.read_text())
+
+    def test_retropie_without_a_package_raises(self):
+        archive = RetroPiePackageList._archive(
+            {"scriptmodules/supplementary/autostart.sh": 'rp_module_id="autostart"\n'}
+        )
+        from scraper.retropie_scraper import Scraper  # noqa: PLC0415
+
+        scraper = Scraper(url="https://codeload.github.com/RetroPie/RetroPie-Setup/tar.gz/" + "0" * 40)
+        with self.assertRaises(ValueError):
+            scraper.module_ids(archive)
+
+
 if __name__ == "__main__":
     unittest.main()
diff --git a/tests/test_target_scrapers.py b/tests/test_target_scrapers.py
index c9733453..0bfdd60c 100644
--- a/tests/test_target_scrapers.py
+++ b/tests/test_target_scrapers.py
@@ -307,7 +307,7 @@ class RetroPieModuleFlags(unittest.TestCase):
         }
 
         def fake_fetch(url, **_kwargs):
-            section = url.rstrip("/").rsplit("/", 1)[-1]
+            section = url.split("?", 1)[0].rstrip("/").rsplit("/", 1)[-1]
             if section in listings:
                 return json.dumps(listings[section])
             return modules[url.split("scriptmodules/", 1)[1]]
@@ -321,6 +321,40 @@ class RetroPieModuleFlags(unittest.TestCase):
 
 
 
+class TargetsReadThePlatformRevision(unittest.TestCase):
+    """A target list read on master filtered packages by flags the pinned
+    package list does not have: every request names the platform's pin."""
+
+    def _urls(self, module, scraper) -> list[str]:
+        seen: list[str] = []
+
+        def record(url, **_kwargs):
+            seen.append(url)
+            if "contents" in url:
+                return json.dumps([{"name": "lr-mgba.sh"}])
+            return 'rp_module_id="lr-mgba"'
+
+        with mock.patch.object(module, "_fetch", record):
+            scraper.fetch_targets()
+        return seen
+
+    def test_retropie_reads_its_codeload_pin(self):
+        pin = retropie_targets_scraper.Scraper.pinned_revision("retropie")
+        self.assertRegex(pin, r"^[0-9a-f]{40}$")
+        urls = self._urls(retropie_targets_scraper, retropie_targets_scraper.Scraper())
+        self.assertTrue(urls)
+        self.assertTrue(all(pin in url for url in urls), urls)
+
+    def test_emudeck_steamos_reads_its_pin(self):
+        pin = emudeck_targets_scraper.Scraper.pinned_revision("emudeck")
+        scraper = emudeck_targets_scraper.Scraper()
+        with mock.patch.object(scraper, "_load_retroarch_cores", return_value=[]):
+            urls = self._urls(emudeck_targets_scraper, scraper)
+        steamos = [u for u in urls if "dragoonDorise" in u]
+        self.assertTrue(steamos)
+        self.assertTrue(all(u.endswith(f"?ref={pin}") for u in steamos), steamos)
+
+
 class HashScrapersRefuseAnUnknownVersion(unittest.TestCase):
     """mame_hash_scraper wrote core_version "unknown" after a failed API call
     and cached it for a day, while the pipeline step still read OK."""
diff --git a/wiki/tools.md b/wiki/tools.md
index c6483d6a..5b6bc627 100644
--- a/wiki/tools.md
+++ b/wiki/tools.md
@@ -561,7 +561,10 @@ today, and answer with one row per subject. Platform and target files are
 re-scraped through the scrapers' own write path into a throwaway copy and
 diffed against the committed file, so the diff decides rather than a version
 string. Core-info is listed and compared with the profiles (a core with no
-profile, a profile that calls standalone a core libretro now builds). Data
+profile, a profile that calls standalone a core libretro now builds, a
+profiled core whose `.info` git blob differs from the one recorded in
+`platforms/_core_info.json`). Once the changed `.info` is read against the
+profile, `--record-coreinfo <core>` records its blob as reviewed. Data
 directories are checked against their upstream, dump catalogs and romset
 snapshots against the catalog they were read from (Redump DAT versions, the
 No-Intro daily rebuild, the newest TOSEC pack, the newest MAME release, the
@@ -579,6 +582,7 @@ python scripts/check_freshness.py --only platforms,targets
 python scripts/check_freshness.py --json
 python scripts/check_freshness.py --profiles     # also runs profile_sync (slow)
 python scripts/check_freshness.py --offline      # local ages only
+python scripts/check_freshness.py --record-coreinfo virtualjaguar  # .info read, record it
 ```
 
 The exit code is non-zero when anything is stale. Emulator profiles are the
@@ -742,11 +746,15 @@ python -m scripts.scraper.romset_dat_importer --source fbneo --fetch
 Snapshots land in `recipes/`, not `provenance/`: the latter holds dump catalogues
 and a recipe is not one. Versions accumulate rather than replace each other,
 because a platform pins the archive of whichever version its list was built
-against. Only sets a profile or platform references are kept, a `romof` parent's
+against. Only sets a profile or platform references are kept, plus the sets
+holding a dump-catalog entry the collection lacks (crc32 and size, and sha1
+when both sides carry one), so `provenance_report.py --missing` can name the
+set that ships it: MAME's `fm7740sx` carries the FM77AV40SX `DICROM.rom`,
+`EXTSUB.rom` and `KANJI2.rom` that No-Intro lists. A `romof` parent's
 members are merged into the child, and members with no CRC32 are dropped: those
 are undumped and a real romset does not carry them.
 
-The store is compacted: 22 MAME versions produce 23,679 entries but only 1,726
+The store is compacted: 22 MAME versions produce 24,101 entries but only 2,148
 distinct recipes, since most sets do not change between releases. Each is kept
 once, `dats` listing every version that agrees and `dat` naming the earliest, so
 an identification reads as "unchanged since that version".